2021 - 2022 USGS Lidar: Midcoast Maine
OCM Partners
Data Set
(DS)
| ID: 69360
| Published / External
Created: 2023-02-24
|
Last Modified: 2023-12-11
Project (PRJ) | ID: 49401
ID: 69360
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
| * » Title | 2021 - 2022 USGS Lidar: Midcoast Maine |
|---|---|
| Short Name | me2021_midcoast_m9767_metadata |
| * Status | Completed |
| Creation Date | 2021 |
| Revision Date | |
| • Publication Date | 2022-01-05 |
| * » Abstract |
Product: These lidar data are processed Classified LAS 1.4 files, formatted to individual 1500 m x 1500 m tiles; used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Geographic Extent: 7 counties in Maine, covering approximately 3981 total square miles. Counties are: Hancock, Kennebec, Knox, Penobscot, Somerset, Waldo, and Washington Dataset Description: The ME_MidCoast_B21_2021 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 2.1. The data were developed based on a horizontal projection/datum of NAD 1983 2011 UTM Zone 19N, Meter and vertical datum of NAVD88 Geoid 18, Meter. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to individual 1500 m x 1500 m tiles. Intensity imagery were formatted to individual 1500 m x 1500 m tiles. DEMs were formatted to individual 1500 m x 1500 m tiles. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in 2021 and 2022, while no snow was on the ground and rivers were at or below normal levels. This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the Entwine Point Tiles (EPT) hosted by USGS on Amazon Web Services. |
| * Purpose |
To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 1-meter cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. |
| Notes | |
| Other Citation Details | |
| • Supplemental Information |
Contract No. G16PC00016, Task Order No. 140G00221F0136; CONTRACTOR: NV5 Geospatial The following are the USGS lidar fields in JSON: {
"ldrinfo" : {
"ldrspec" : "USGS-NGP Base Specification v2.1", "ldrsens" : "Riegl VQ1560i", "ldrmaxnr" : "unlimited", "ldrnps" : "0.71", "ldrdens" : "2.0", "ldranps" : "0.58", "ldradens" : "2.97", "ldrfltht" : "1900", "ldrfltsp" : "140", "ldrscana" : "29", "ldrscanr" : "160", "ldrpulsr" : "350", "ldrpulsd" : "3", "ldrpulsw" : "0.34", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.18", "ldrswatw" : "2106.0", "ldrswato" : "20", "ldrgeoid" : "Geoid 18", "ldrcrs" : "NAD 1983 2011 UTM Zone 19N, Meter" }, "ldraccur" : {
"ldrchacc" : "0", "rawnva" : "0.0", "rawnvan" : "0" }, "lasinfo" : {
"lasver" : "1.4", "lasprf" : "6", "laswheld" : "Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.", "lasolap" : "Any overage point deemed geometrically reliable will be used within the normal classification schema. Overage points are not specifically flagged with any special bit value.", "lasintr" : "16", "lasclass" : {
"clascode" : "1", "clasitem" : "Processed, but Unclassified" }, "lasclass" : {
"clascode" : "2", "clasitem" : "Bare-Earth Ground" }, "lasclass" : {
"clascode" : "7", "clasitem" : "Low Noise" }, "lasclass" : {
"clascode" : "9", "clasitem" : "Water" }, "lasclass" : {
"clascode" : "17", "clasitem" : "Bridge Decks" }, "lasclass" : {
"clascode" : "18", "clasitem" : "High Noise" }, "lasclass" : {
"clascode" : "20", "clasitem" : "Ignored Ground" }, "lasclass" : {
"clascode" : "22", "clasitem" : "Temporal Exclusion (if applicable)" } }} |
| DOI (Digital Object Identifier) | |
| DOI Registration Authority | |
| DOI Issue Date |
Keywords
Theme Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION |
| Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION |
| ISO 19115 Topic Category | elevation |
Temporal Keywords
| Thesaurus | Keyword |
|---|---|
* Spatial Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA |
| Global Change Master Directory (GCMD) Location Keywords | CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MAINE |
| Global Change Master Directory (GCMD) Location Keywords | VERTICAL LOCATION > LAND SURFACE |
Stratum Keywords
| Thesaurus | Keyword |
|---|---|
Instrument Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Instrument Keywords | LIDAR > Light Detection and Ranging |
Platform Keywords
| Thesaurus | Keyword |
|---|---|
| Global Change Master Directory (GCMD) Platform Keywords | Airplane > Airplane |
Physical Location
| • » Organization | Office for Coastal Management |
|---|---|
| • » City | Charleston |
| • » State/Province | SC |
| • Country | |
| • » Location Description |
Data Set Information
| * Data Set Scope Code | Data Set |
|---|---|
| • Data Set Type | Elevation |
| • Maintenance Frequency | None Planned |
| Maintenance Note | |
| » Data Presentation Form | Model (digital) |
| • Entity Attribute Overview | |
| Entity Attribute Detail Citation | |
| Entity Attribute Detail URL | |
| Distribution Liability |
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. |
| Data Set Credit | NV5 Geospatial, USGS |
Support Roles
| * » Support Role | Data Steward |
|---|---|
| * » Date Effective From | 2023 |
| Date Effective To | |
| Organization | NOAA Office for Coastal Management (NOAA/OCM) |
| Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address | coastal.info@noaa.gov |
| Phone | (843) 740-1202 |
| Fax | |
| Mobile | |
| URL | https://coast.noaa.gov |
| Business Hours | |
| Contact Instructions |
| * » Support Role | Distributor |
|---|---|
| * » Date Effective From | 2023 |
| Date Effective To | |
| Organization | NOAA Office for Coastal Management (NOAA/OCM) |
| Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address | coastal.info@noaa.gov |
| Phone | (843) 740-1202 |
| Fax | |
| Mobile | |
| URL | https://coast.noaa.gov |
| Business Hours | |
| Contact Instructions |
| * » Support Role | Distributor |
|---|---|
| * » Date Effective From | 2022 |
| Date Effective To | |
| Organization | U.S. Geological Survey |
| Address |
12201 Sunrise Valley Drive Reston, VA 20191 USA |
| Email Address | |
| Phone | |
| Fax | |
| Mobile | |
| URL | https://usgs.gov |
| Business Hours | |
| Contact Instructions |
| * » Support Role | Metadata Contact |
|---|---|
| * » Date Effective From | 2023 |
| Date Effective To | |
| Organization | NOAA Office for Coastal Management (NOAA/OCM) |
| Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address | coastal.info@noaa.gov |
| Phone | (843) 740-1202 |
| Fax | |
| Mobile | |
| URL | https://coast.noaa.gov |
| Business Hours | |
| Contact Instructions |
| * » Support Role | Point of Contact |
|---|---|
| * » Date Effective From | 2023 |
| Date Effective To | |
| Organization | NOAA Office for Coastal Management (NOAA/OCM) |
| Address |
2234 South Hobson Ave Charleston, SC 29405-2413 |
| Email Address | coastal.info@noaa.gov |
| Phone | (843) 740-1202 |
| Fax | |
| Mobile | |
| URL | https://coast.noaa.gov |
| Business Hours | |
| Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
| * » Support Role | |
|---|---|
| * » Date Effective From | |
| Date Effective To | |
| * » Contact | |
| * Contact Instructions |
Extents
| Currentness Reference | Ground Condition |
|---|
Extent Group 1
| Extent Description |
|---|
Extent Group 1 / Geographic Area 1
| * » W° Bound | -68.5948564479 |
|---|---|
| * » E° Bound | -66.9000391036 |
| * » N° Bound | 45.0509545263 |
| * » S° Bound | 43.9491792475 |
| * » Description |
MidCoast_1 |
Extent Group 1 / Vertical Extent
| EPSG Code | |
|---|---|
| Vertical Minimum | |
| Vertical Maximum |
Extent Group 1 / Time Frame 1
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2021-05-19 |
| End | 2021-05-20 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 1 / Time Frame 2
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-05-24 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 1 / Time Frame 3
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-05-27 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 1 / Time Frame 4
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2021-05-13 |
| End | 2021-05-14 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 1 / Time Frame 5
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2021-05-16 |
| End | 2021-05-17 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 1 / Time Frame 6
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-05-09 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_1 |
Extent Group 2
| Extent Description |
|---|
Extent Group 2 / Geographic Area 1
| * » W° Bound | -69.53 |
|---|---|
| * » E° Bound | -68.42 |
| * » N° Bound | 45.05 |
| * » S° Bound | 43.77 |
| * » Description |
MidCoast_2 |
Extent Group 2 / Vertical Extent
| EPSG Code | |
|---|---|
| Vertical Minimum | |
| Vertical Maximum |
Extent Group 2 / Time Frame 1
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-12-15 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 2
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-05-13 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 3
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2022-04-15 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 4
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2022-04-18 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 5
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2022-04-20 |
| End | 2022-04-21 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 6
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2022-05-09 |
| End | 2022-05-11 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 7
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2021-05-17 |
| End | 2021-05-19 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Dates of collection for MidCoast_2 |
Extent Group 2 / Time Frame 8
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-05-24 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 9
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-11-26 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 10
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2021-11-28 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 2 / Time Frame 11
| * » Time Frame Type | Discrete |
|---|---|
| * » Start | 2022-04-23 |
| End | |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Date of collection for MidCoast_2 |
Extent Group 3
| Extent Description |
|---|
Extent Group 3 / Geographic Area 1
| * » W° Bound | -68.27 |
|---|---|
| * » E° Bound | -67.04 |
| * » N° Bound | 45.04 |
| * » S° Bound | 44.52 |
| * » Description |
MidCoast_3 |
Extent Group 3 / Vertical Extent
| EPSG Code | |
|---|---|
| Vertical Minimum | |
| Vertical Maximum |
Extent Group 3 / Time Frame 1
| * » Time Frame Type | Range |
|---|---|
| * » Start | 2021-05-09 |
| End | 2022-05-11 |
| Alternate Start As Of Info | |
| Alternate End As Of Info | |
| Description |
Dates of collection for MidCoast_3 |
Spatial Information
Spatial Resolution
| Angular Distance | |
|---|---|
| Angular Distance Units | |
| Horizontal Distance | |
| Horizontal Distance Units | |
| Vertical Distance | |
| Vertical Distance Units | |
| Equivalent Scale Denominator | |
| Level of Detail Description |
Spatial Representation
| Grid Representation Used? | No |
|---|---|
| Vector Representation Used? | Yes |
| Text / Table Representation Used? | No |
| TIN Representation Used? | No |
| Stereo Model Representation Used? | No |
| Video Representation Used? | No |
Grid Representation
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| Transformation Parameter Available? | |||||||||||||
Axis Dimension |
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Axis Dimension |
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Vector Representation
| Topology Level | |
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| Complex Object Present? | |
| Complex Object Count | |
| Composite Object Present? | |
| Composite Object Count | |
| Curve Object Present? | |
| Curve Object Count | |
| Point Object Present? | |
| Point Object Count | |
| Solid Object Present? | |
| Solid Object Count | |
| Surface Object Present? | |
| Surface Object Count |
Reference Systems
Reference System
| EPSG Code | EPSG:3857 | ||||||||||||||||||||||||||||
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Horizontal Resolution |
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Vertical Resolution |
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Reference System
| EPSG Code | EPSG:5703 | ||||||||||||||||||||||||||||
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Horizontal Resolution |
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Vertical Resolution |
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Reference System
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Horizontal Resolution |
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Vertical Resolution |
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Access Information
| Data License | |
|---|---|
| Data License URL | |
| Data License Statement | |
| * » Security Class | Unclassified |
| * Security Classification System | |
| Security Handling Description | |
| • Data Access Policy | |
| » Data Access Procedure |
Data is available online for bulk and custom downloads. |
| • » Data Access Constraints |
None |
| • Data Use Constraints |
Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. |
| Metadata Access Constraints | |
| Metadata Use Constraints |
Distribution Information
| Start Date | 2023-02-24 |
|---|---|
| End Date | Present |
| » Download URL | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9767/details/9767 |
| Distributor | NOAA Office for Coastal Management (NOAA/OCM) (2023 - Present) |
| File Name | Customized Download |
| Description |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options. |
| File Date/Time | |
| File Type (Deprecated) | Zip |
| Distribution Format | |
| File Size | |
| Application Version | |
| Compression | Zip |
| Review Status |
| Start Date | 2023 |
|---|---|
| End Date | Present |
| » Download URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/ME_MidCoast_2021_B21/ME_MidCoast_1_2021/LAZ/ |
| Distributor | U.S. Geological Survey (2022 - Present) |
| File Name | Bulk Download - MidCoast_1 |
| Description |
Bulk download of data files in LAZ format, in UTM Zone 19 NAD83 (2011), meters coordinates, orthometric heights in meters. |
| File Date/Time | |
| File Type (Deprecated) | LAZ |
| Distribution Format | LAS/LAZ - LASer |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | 2023 |
|---|---|
| End Date | Present |
| » Download URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/ME_MidCoast_2021_B21/ME_MidCoast_2_2021/LAZ/ |
| Distributor | U.S. Geological Survey (2022 - Present) |
| File Name | Bulk Download - MidCoast_2 |
| Description |
Bulk download of data files in LAZ format, in UTM Zone 19 NAD83 (2011), meters coordinates, orthometric heights in meters. |
| File Date/Time | |
| File Type (Deprecated) | LAZ |
| Distribution Format | LAS/LAZ - LASer |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | 2023 |
|---|---|
| End Date | Present |
| » Download URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/ME_MidCoast_2021_B21/ME_MidCoast_3_2021/LAZ/ |
| Distributor | U.S. Geological Survey (2022 - Present) |
| File Name | Bulk Download - MidCoast_3 |
| Description |
Bulk download of data files in LAZ format, in UTM Zone 19 NAD83 (2011), meters coordinates, orthometric heights in meters. |
| File Date/Time | |
| File Type (Deprecated) | |
| Distribution Format | LAS/LAZ - LASer |
| File Size | |
| Application Version | |
| Compression | |
| Review Status |
| Start Date | |
|---|---|
| End Date | |
| » Download URL | |
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| FGDC Content Type | |
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| Compression | |
| Review Status |
| Start Date | |
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| Application Version | |
| Compression | |
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| Start Date | |
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| » Download URL | |
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| Application Version | |
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| Review Status |
Archive Information
| Location | |
|---|---|
| File Identifier | |
| File Name | |
| URL | |
| Description | |
| DOI | |
| Archive Date | |
| Archive Update Frequency |
| Location | |
|---|---|
| File Identifier | |
| File Name | |
| URL | |
| Description | |
| DOI | |
| Archive Date | |
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| Location | |
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| File Identifier | |
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| URL | |
| Description | |
| DOI | |
| Archive Date | |
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URLs
| URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/ME_MidCoast_2021_B21/ME_MidCoast_1_2021/reports/ME_MidCoast_2021_B21_WU220045_ProcessingReport.pdf |
|---|---|
| Name | Lidar Report - MidCoast_1 |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
Link to the lidar report for MidCoast_1 |
| URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/ME_MidCoast_2021_B21/ |
|---|---|
| Name | USGS Additional Info |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
This link is to the reports, breaklines, metadata, spatial metadata, and shapefiles. |
| URL | https://usgs.entwine.io/data/view.html?r=[%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_1_2021/ept.json%22,%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_2_2021/ept.json%22,%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_3_2021/ept.json%22] |
|---|---|
| Name | USGS 3D View |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
Link to view the point cloud, using the Entwine Point Tile (EPT) format, in the 3D Potree viewer. |
| URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_1_2021/ept.json |
|---|---|
| Name | USGS Entwine Point Tile (EPT) - MidCoast_1 |
| URL Type | Online Resource |
| File Resource Format | json |
| Description |
Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud. |
| URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/ME_MidCoast_2021_B21/USGS_ME_MidCoast_2021_B21_Project_Report.pdf |
|---|---|
| Name | USGS Project Report |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
Link to the USGS Project Report that provides information about the project, vertical accuracy results, and the point classes and sensors used. |
| URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/ME_MidCoast_2021_B21/ME_MidCoast_2_2021/reports/37396_MaineMidcoast_Delivery2_ProjectReport.pdf |
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| Name | Lidar Report - MidCoast_2 |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
Link to the lidar report for MidCoast_1 |
| URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_2_2021/ept.json |
|---|---|
| Name | USGS Entwine Point Tile (EPT) - MidCoast_2 |
| URL Type | Online Resource |
| File Resource Format | json |
| Description |
Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud. |
| URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_3_2021/ept.json |
|---|---|
| Name | USGS Entwine Point Tile (EPT) - MidCoast_3 |
| URL Type | Online Resource |
| File Resource Format | json |
| Description |
Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud. |
| URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/metadata/ME_MidCoast_2021_B21/ME_MidCoast_3_2021/reports/MaineMidcoast_B21_WU300238_ProjectReport.pdf |
|---|---|
| Name | Lidar Report - MidCoast_3 |
| URL Type | Online Resource |
| File Resource Format | |
| Description |
Link to the lidar report for MidCoast_3 |
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Activity Log
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Issues
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Technical Environment
| Description |
MicroStation Connect; TerraScan Version 21.016; TerraModeler Version 21.008; GeoCue Version 2020.1.22.1; Esri ArcGIS 10.6; Global Mapper 19/20; RiProcess 1.8.6; Windows 10 Operating System \\point_cloud\tilecls\*.las |
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Data Quality
| Representativeness | |
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| Accuracy | |
| Analytical Accuracy | |
| Horizontal Positional Accuracy |
Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95% of the time. Based on a flying altitude of 1900 meters, an IMU error of 0.002 decimal degrees, and a GNSS positional error of 0.019 meters, this project was compiled to meet 0.21 meters horizontal accuracy at the 95% confidence level or 0.12 meters RMSEr. |
| Vertical Positional Accuracy |
This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. USGS Determined Vertical Accuracy: Non-Vegetated Vertical Accuracy (NVA) = 7.08 cm at 95% Confidence Level or 3.6 cm RMSE Vegetated Vertical Accuracy (VVA) = 15.8 cm at 95th Percentile |
| Quantitation Limits | |
| Bias | |
| Comparability | |
| Completeness Measure | |
| Precision | |
| Analytical Precision | |
| Field Precision | |
| Sensitivity | |
| Detection Limit | |
| Completeness Report |
These LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The raw point cloud is of good quality and the data pass Non-Vegetated Vertical Accuracy specifications. |
| Conceptual Consistency |
Data cover the entire area specified for this project. |
| » Quality Control Procedures Employed |
Data Management
| » Have Resources for Management of these Data Been Identified? | Yes |
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| » Approximate Percentage of Budget for these Data Devoted to Data Management | Unknown |
| » Do these Data Comply with the Data Access Directive? | Yes |
| » Is Access to the Data Limited Based on an Approved Waiver? | |
| » If Distributor (Data Hosting Service) is Needed, Please Indicate | |
| » Approximate Delay Between Data Collection and Dissemination | |
| » If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed | |
| » Actual or Planned Long-Term Data Archive Location | NCEI-CO |
| » Approximate Delay Between Data Collection and Archiving | |
| » How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive? |
Data is backed up to tape and to cloud storage. |
Lineage
| » Lineage Statement |
The NOAA Office for Coastal Management (OCM) ingested references to the USGS Entwine Point Tile (EPT) files hosted on Amazon Web Services (AWS) into the Digital Coast Data Access Viewer (DAV). The DAV accesses the point cloud as it resides on AWS under the usgs-lidar-public-container. |
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Sources
| Citation Title | USGS AWS Entwine Point Tile |
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| Contact Role Type | Publisher |
| Contact Type | Organization |
| Contact Name | USGS |
| Publish Date | |
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| Citation URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_3_2021/ept.json |
| Citation URL Name | Entwine Point Tile file for ME_MidCoast_3_2021 |
| Citation URL Description | |
| Source Contribution |
| Citation Title | USGS AWS Entwine Point Tile |
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| Contact Role Type | Publisher |
| Contact Type | Organization |
| Contact Name | USGS |
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| Citation URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_1_2021/ept.json |
| Citation URL Name | Entwine Point Tile file for ME_MidCoast_1_2021 |
| Citation URL Description | |
| Source Contribution |
| Citation Title | USGS AWS Entwine Point Tile |
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| Contact Role Type | Publisher |
| Contact Type | Organization |
| Contact Name | USGS |
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| Citation URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_2_2021/ept.json |
| Citation URL Name | Entwine Point Tile file for ME_MidCoast_2_2021 |
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Process Steps
| Process Step Number | 1 |
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| » Description |
Raw Data and Boresight Processing: The boresight for each lift was done individually as the solution may change slightly from lift to lift. The following steps describe the Raw Data Processing and Boresight process: 1) Technicians processed the raw data to LAS format flight lines using the final GPS/IMU solution. This LAS data set was used as source data for boresight. 2) Technicians first used NV5 Geospatial proprietary and commercial software to calculate initial boresight adjustment angles based on sample areas selected in the lift. These areas cover calibration flight lines collected in the lift, cross tie, and production flight lines. These areas are well distributed in the lift coverage and cover multiple terrain types that are necessary for boresight angle calculation. The technicians then analyzed the results and made any necessary additional adjustment until it was acceptable for the selected areas. 3) Once the boresight angle calculation was completed for the selected areas, the adjusted settings were applied to all of the flight lines of the lift and checked for consistency. The technicians utilized commercial and proprietary software packages to analyze how well flight line overlaps matched for the entire lift and adjusted as necessary until the results met the project specifications. 4) Once all lifts were completed with individual boresight adjustment, the technicians checked and corrected the vertical misalignment of all flight lines and also the matching between data and ground truth. The relative accuracy was less than or equal to 7 cm RMSEz within individual swaths and less than or equal to 10 cm RMSEz or within swath overlap (between adjacent swaths). 5) The technicians ran a final vertical accuracy check of the boresighted flight lines against the surveyed checkpoints after the z correction to ensure the requirement of NVA = 19.6 cm 95% Confidence Level (Required Accuracy) was met. |
| Process Date/Time | 2022-01-01 00:00:00 |
| Process Contact | |
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| Process Step Number | 2 |
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| » Description |
LAS Point Classification: The point classification was performed as described below. The bare earth surface was manually reviewed to ensure correct classification on the Class 2 (Ground) points. After the bare-earth surface was finalized, it was then used to generate all hydro-breaklines through heads-up digitization. All ground (ASPRS Class 2) LiDAR data inside of the Lake Pond and Double Line Drain hydro-flattened breaklines were then classified to Water (ASPRS Class 9) using proprietary tools. A buffer of 1 meter was also used around each hydro-flattened feature to classify these ground (ASPRS Class 2) points to Ignored ground (ASPRS Class 20). All Lake Pond Island and Double Line Drain Island features were checked to ensure that the ground (ASPRS Class 2) points were reclassified to the correct classification after the automated classification was completed. Any noise that was identified either through manual review or automated routines was classified to the appropriate class ( ASPRS Class 7 and/or ASPRS Class 18) followed by flagging with the withheld bit. All data were manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper was used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files for point cloud data. NV5 Geospatial proprietary software was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information. |
| Process Date/Time | 2022-01-01 00:00:00 |
| Process Contact | |
| Phone (Voice) | |
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| Source |
| Process Step Number | 3 |
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| » Description |
Original point clouds in LAS/LAZ format were restructured as Entwine Point Tiles and stored on Amazon Web Services. The data were re-projected horizontally to WGS84 web mercator (EPSG 3857) and no changes were made to the vertical elevations in NAVD88 (GEOID18). |
| Process Date/Time | |
| Process Contact | U.S. Geological Survey |
| Phone (Voice) | |
| Email Address | |
| Source |
| Process Step Number | 4 |
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| » Description |
The NOAA Office for Coastal Management (OCM) created references to the Entwine Point Tile (EPT) files that were ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the point cloud as it resides on Amazon Web Services (AWS) under the usgs-lidar-public container. These are the AWS URLs being accessed: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_1_2021/ept.json https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_2_2021/ept.json |
| Process Date/Time | 2023-02-24 00:00:00 |
| Process Contact | Office for Coastal Management (OCM) |
| Phone (Voice) | |
| Email Address | |
| Source |
| Process Step Number | 5 |
|---|---|
| » Description |
The NOAA Office for Coastal Management (OCM) created a reference to the Entwine Point Tile (EPT) file that was ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the point cloud as it resides on Amazon Web Services (AWS) under the usgs-lidar-public container. This is the AWS URL being accessed: https://s3-us-west-2.amazonaws.com/usgs-lidar-public/ME_MidCoast_3_2021/ept.json |
| Process Date/Time | 2023-12-08 00:00:00 |
| Process Contact | NOAA Office for Coastal Management (NOAA/OCM) |
| Phone (Voice) | (843) 740-1202 |
| Email Address | coastal.info@noaa.gov |
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Acquisition Information
Instruments
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FAQs
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Child Items
Rubric scores updated every 15m
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Related Items
| Item Type | Relationship Type | Title |
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Catalog Details
| Catalog Item ID | 69360 |
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| Metadata Record Created By | Rebecca Mataosky |
| Metadata Record Created | 2023-02-24 16:10+0000 |
| Metadata Record Last Modified By | Rebecca Mataosky |
| » Metadata Record Last Modified | 2023-12-11 16:34+0000 |
| Metadata Record Published | 2023-02-24 |
| Owner Org | OCMP |
| Metadata Publication Status | Published Externally |
| Do Not Publish? | N |
| Metadata Workflow State | Published / External |
| Metadata Last Review Date | 2023-02-24 |
| Metadata Review Frequency | 1 Year |
| Metadata Next Review Date | 2024-02-24 |
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