2020 ISGS Lidar: 8 County, IL
OCM Partners
Data Set
(DS)
| ID: 72410
| Published / External
Created: 2024-04-08
|
Last Modified: 2024-07-31
Project (PRJ) | ID: 49401
ID: 72410
Data Set (DS)
* Discovery• First Pass
» Metadata Rubric
Item Identification
* » Title | 2020 ISGS Lidar: 8 County, IL |
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Short Name | il2020_8county_m10707_metadata |
* Status | Completed |
Creation Date | 2020 |
Revision Date | |
• Publication Date | 2020 |
* » Abstract |
Product: Processed, classified lidar point cloud data tiles in LAS 1.4 format. Geographic Extent: The data covers approximately 3985 square miles in the Wabash and Embarras Rivers Basin in east central Illinois. IL_8County_B1 (Work Unit 1922332): The data covers 2576 square miles in the following counties: Clark, Coles, Cumberland, Douglas, Edgar Collected by Merrick & Company, Inc. IL_8County_B2 (Work Unit 193826): The data covers 1409 square miles in the following counties: Crawford, Jasper, Lawrence Collected by Woolpert Dataset Description of the Original Data: The 2020 data acquisition of 8 Counties in the Wabash and Embarras Basin lidar project called for the planning, acquisition, processing, and production of derivative products of QL2+ lidar data to be collected at a nominal pulse spacing (NPS) of 0.5 meters. Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2.1. The data was developed based on a horizontal datum/projection of NAD83 (2011) State Plane Illinois East Zone Survey Feet, and a vertical datum of NAVD88 (GEOID12B) US Survey Feet. Lidar data was delivered as processed LAS 1.4 files formatted to individual 2,000-foot x 2,000-foot tiles. The contractual aggregate nominal pulse spacing (ANPS) is less than or equal to 0.5m. The contractual aggregate nominal point density (ANPD) is 4.0 points or greater per square meter. Classifications include: Unclassified, Ground, Automated Low Veg [0.5-5 feet], Automated Medium Veg [5-20 feet], Automated High Veg [>20 feet], Automated Buildings, Low Noise, Water, Bridge Decks, High Noise and Ignore Ground (breakline proximity). Model key points are bit-flagged and created from ground (class = 2) points using a five foot horizontal and a 0.2 foot vertical variance. Ground Conditions: Lidar was collected from March 30, 2020 through May 4, 2020 while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, 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 |
The purpose of this project was to obtain Lidar data for the Illinois Height Modernization Program. |
Notes | |
Other Citation Details | |
• Supplemental Information |
The following are the USGS lidar fields in JSON: {
"ldrinfo" : {
"ldrspec" : "USGS-NGP Base Lidar Specification v2.1", "ldrsens" : "Optech Galaxy Prime Airborne Laser Terrain Mappers (ALTM) 5060380", "ldrmaxnr" : "8", "ldrnps" : "0.5", "ldrdens" : "4", "ldranps" : "0.5", "ldradens" : "4", "ldrfltht" : "1750", "ldrfltsp" : "170", "ldrscana" : "42", "ldrscanr" : "95", "ldrpulsr" : "700", "ldrpulsd" : "3.5", "ldrpulsw" : "0.875", "ldrwavel" : "1064", "ldrmpia" : "1", "ldrbmdiv" : "0.25", "ldrswatw" : "1344", "ldrswato" : "20", "ldrgeoid" : "National Geodetic Survey (NGS) Geoid12B" }, "ldraccur" : {
"ldrchacc" : "0", "rawnva" : "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" : "Swath "overage" points were identified in these files by a separate bit flag.", "lasintr" : "12-bit", "lasclass" : {
"clascode" : "1", "clasitem" : "Undetermined/Unclassifed" }, "lasclass" : {
"clascode" : "2", "clasitem" : "Ground" }, "lasclass" : {
"clascode" : "3", "clasitem" : "Low Veg (Automated)" }, "lasclass" : {
"clascode" : "4", "clasitem" : "Medium Veg (Automated)" }, "lasclass" : {
"clascode" : "5", "clasitem" : "High Veg (Automated)" }, "lasclass" : {
"clascode" : "6", "clasitem" : "Building (Automated)" }, "lasclass" : {
"clascode" : "7", "clasitem" : "Low point (noise)" }, "lasclass" : {
"clascode" : "9", "clasitem" : "Water" }, "lasclass" : {
"clascode" : "17", "clasitem" : "Bridge Decks" }, "lasclass" : {
"clascode" : "18", "clasitem" : "High Noise" }, "lasclass" : {
"clascode" : "20", "clasitem" : "Ignore ground (near a breakline)" } }} |
DOI (Digital Object Identifier) | |
DOI Registration Authority | |
DOI Issue Date |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords | EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION |
ISO 19115 Topic Category | elevation |
Temporal Keywords
Thesaurus | Keyword |
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* 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 > ILLINOIS |
Global Change Master Directory (GCMD) Location Keywords | VERTICAL LOCATION > LAND SURFACE |
Stratum Keywords
Thesaurus | Keyword |
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Instrument Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Instrument Keywords | LIDAR > Light Detection and Ranging |
Platform Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Platform Keywords | Airplane > Airplane |
Physical Location
• » Organization | Office for Coastal Management |
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• » City | Charleston |
• » State/Province | SC |
• Country | |
• » Location Description |
Data Set Information
* Data Set Scope Code | Data Set |
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• Data Set Type | Elevation |
• Maintenance Frequency | Unknown |
Maintenance Note | |
» Data Presentation Form | Model (digital) |
• Entity Attribute Overview | |
Entity Attribute Detail Citation |
ASPRS ver 1.4 format:1 = Unclassified2 = Ground3 = Low Veg [0.5-5 feet]4 = Medium Veg [5-20 feet]5 = High Veg [>20 feet]6 = Automated Building7 = Low Noise9 = Water17 = Bridge18 = High Noise20 = Ignore Ground (breakline proximity)Model key points are bit-flagged and created from ground (class = 2) points using a 5 foot horizontal and a 0.2 foot vertical variance. |
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 | Merrick & Company, Woolpert, IL State Geological Survey (ISGS), USGS |
Support Roles
* » Support Role | Data Steward |
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* » Date Effective From | 2024 |
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 |
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* » Date Effective From | 2024 |
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 |
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* » Date Effective From | 2021 |
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 | 2024 |
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 | 2024 |
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 | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
* » Support Role | |
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* » Date Effective From | |
Date Effective To | |
* » Contact | |
* Contact Instructions |
Extents
Currentness Reference | Ground Condition |
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Extent Group 1
Extent Description |
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Extent Group 1 / Geographic Area 1
* » W° Bound | -88.5 |
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* » E° Bound | -87.5 |
* » N° Bound | 39.9 |
* » S° Bound | 39.19 |
* » Description |
IL_8County_B1 (Work Unit 192232): The data covers 2576 square miles in the following counties: Clark, Coles, Cumberland, Douglas, Edgar |
Extent Group 1 / Vertical Extent
EPSG Code | |
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Vertical Minimum | |
Vertical Maximum |
Extent Group 1 / Time Frame 1
* » Time Frame Type | Range |
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* » Start | 2020-04-08 |
End | 2020-05-04 |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Dates of collection for IL_8County_B1 (Work Unit 192232) |
Extent Group 2
Extent Description |
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Extent Group 2 / Geographic Area 1
* » W° Bound | -88.4 |
---|---|
* » E° Bound | -87.46 |
* » N° Bound | 39.21 |
* » S° Bound | 38.54 |
* » Description |
IL_8County_B2 (Work Unit 193826): The data covers 1409 square miles in the following counties: Crawford, Jasper, Lawrence |
Extent Group 2 / Vertical Extent
EPSG Code | |
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Vertical Minimum | |
Vertical Maximum |
Extent Group 2 / Time Frame 1
* » Time Frame Type | Range |
---|---|
* » Start | 2020-03-30 |
End | 2020-04-10 |
Alternate Start As Of Info | |
Alternate End As Of Info | |
Description |
Dates of collection for IL_8County_B2 (Work Unit 193826) |
Spatial Information
Spatial Resolution
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Horizontal Distance | |
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Vertical Distance | |
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Equivalent Scale Denominator | |
Level of Detail Description |
Spatial Representation
Grid Representation Used? | No |
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Vector Representation Used? | Yes |
Text / Table Representation Used? | No |
TIN Representation Used? | No |
Stereo Model Representation Used? | No |
Video Representation Used? | No |
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Reference Systems
Reference System
EPSG Code | EPSG:3857 | ||||||||||||||||||||||||||||
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Reference System
EPSG Code | EPSG:5703 | ||||||||||||||||||||||||||||
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Access Information
Data License | |
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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 | 2024-04-08 |
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End Date | Present |
» Download URL | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10107/details/10107 |
Distributor | NOAA Office for Coastal Management (NOAA/OCM) (2024 - 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) | |
Distribution Format | Not Applicable |
File Size | |
Application Version | |
Compression | Zip |
Review Status |
Start Date | 2021 |
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End Date | Present |
» Download URL | https://rockyweb.usgs.gov/vdelivery/Datasets/Staged/Elevation/LPC/Projects/IL_8County_2020_A20/ |
Distributor | U.S. Geological Survey (2021 - Present) |
File Name | Bulk Download |
Description |
Bulk download of data files in LAZ format, a horizontal projection/datum of NAD83 (2011), State Plane Illinois East Zone, US survey feet and vertical datum of NAVD88 (GEOID12B), US survey feet. |
File Date/Time | |
File Type (Deprecated) | |
Distribution Format | LAS/LAZ - LASer |
File Size | |
Application Version | |
Compression | LAZ |
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Archive Information
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URLs
URL | https://coast.noaa.gov/dataviewer/ |
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Name | NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) |
URL Type | Online Resource |
File Resource Format | HTML |
Description |
The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. |
URL | https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/IL_8County_2020_A20/IL_8County_B1_2020/reports/Lidar_report/2020_ISGS_Wabash_and_Embarras_Basin_Lidar_mapping_report.pdf |
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Name | Lidar Report - IL_8County_B1 |
URL Type | Online Resource |
File Resource Format | |
Description |
Link to the lidar report. |
URL | https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/IL_8County_2020_A20/IL_8County_B2_2020/reports/IL_3_County_Lidar_2020_Project_Report_StPln.pdf |
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Name | Lidar Report - IL_8County_B2 |
URL Type | Online Resource |
File Resource Format | |
Description |
Link to the lidar report. |
URL | https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/IL_8County_2020_A20/IL_8County_2020_A20_WP_Report.pdf |
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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://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/IL_8County_2020_A20/ |
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Name | USGS Additional Info |
URL Type | Online Resource |
File Resource Format | |
Description |
Link to the reports, breaklines, metadata, and spatial metadata. |
URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B1_2020/ept.json |
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Name | USGS Entwine Point Tile (EPT) - IL_8County_B1 |
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/IL_8County_B2_2020/ept.json |
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Name | USGS Entwine Point Tile (EPT) - IL_8County_B2 |
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://usgs.entwine.io/data/view.html?r=[%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B1_2020/ept.json%22,%22https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B2_2020/ept.json%22] |
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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. |
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Activity Log
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Issues
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Issue |
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Author | |
Issue |
Technical Environment
Description |
Microsoft Windows 7 Professional Service Pack 1; ESRI ArcCatalog 10.7.1 |
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Data Quality
Representativeness | |
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Accuracy | |
Analytical Accuracy | |
Horizontal Positional Accuracy |
For IL_8County_B2 (Work Unit 193826) which includes Crawford, Jasper, and Lawrence counties, the data set was produced to meet ASPRSPositional Accuracy Standards for Digital Geospatial Data (2014) for a 17.6 cm RMSEx / RMSEy Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 43.2 cm at a 95% confidence level. No information about the horizontal accuracy was provided for IL_8County_B1 (Work Unit 192232) which includes Clark, Coles, Cumberland, Douglas, and Edgar counties. |
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: Tested NVA RMSEz = 4.12 cm Tested NVA Accuracy z at 95% confidence interval (RMSEz * 1.96) = 8.09 cm Tested 95th percentile value for VVA is : 12.61 cm For more information see the USGS project report and the lidar reports. The links to these reports are provided in the URL section of this metadata record. |
Quantitation Limits | |
Bias | |
Comparability | |
Completeness Measure | |
Precision | |
Analytical Precision | |
Field Precision | |
Sensitivity | |
Detection Limit | |
Completeness Report |
The dataset was captured, attributed, and reviewed to ensure completeness and accuracy of at least 95%. |
Conceptual Consistency |
The dataset was captured, attributed, and reviewed to ensure completeness and accuracy of at least 95%. |
» 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-NC |
» 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 cloud storage. |
Lineage
» Lineage Statement |
The NOAA Office for Coastal Management (OCM) ingested references to the USGS Entwine Point Tiles (EPT) 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 (EPT) - IL_8County_B1 |
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Contact Role Type | Publisher |
Contact Type | Organization |
Contact Name | USGS |
Publish Date | |
Extent Type | |
Extent Start Date/Time | |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B1_2020/ept.json |
Citation URL Name | Entwine Point Tile for IL_8County_B1 |
Citation URL Description | |
Source Contribution |
Citation Title | USGS AWS Entwine Point Tile (EPT) - IL_8County_B2 |
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Contact Role Type | Publisher |
Contact Type | Organization |
Contact Name | USGS |
Publish Date | |
Extent Type | |
Extent Start Date/Time | |
Extent End Date/Time | |
Scale Denominator | |
Citation URL | https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B2_2020/ept.json |
Citation URL Name | Entwine Point Tile for IL_8County_B2 |
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Process Steps
Process Step Number | 1 |
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» Description |
LIDAR data was collected using the Optech Galaxy sensor. The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed through automated filtering that separates the data into different classification groups: unclassified points, ground points, low veg [0.5-5 feet], medium veg [5-20 feet], high veg [>20 feet], automated buildings, low noise, water, bridge decks, high noise and ignore ground (breakline proximity). The data was next taken into MARS to reclassify the erroneous points that may remain in the LIDAR point cloud after auto filter. Four points or greater per square meter (QL2) ASPRS ver 1.4 format. |
Process Date/Time | 2020-11-23 00:00:00 |
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Process Step Number | 2 |
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» Description |
LiDAR swath data was measured to have an averageof 0.39 meter nominal pulse spacing and a 6.6 pulses per meter. The method used was counting first return points within the each swath then dividing by the area of the extent of the corresponding swath to get density. NPS was mathematically derived from this density number. This was performed on each swath then averaged to generate the two numbers above. This USGS method does not consider swath sidelap in these calculations. |
Process Date/Time | 2020-11-23 00:00:00 |
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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 the vertical units were converted to meters (NAVD88 GEOID12B). |
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Process Contact | U.S. Geological Survey |
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Process Step Number | 4 |
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» Description |
The NOAA Office for Coastal Management (OCM) created references to the Entwine Point Tiles (EPT) 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/IL_8County_B1_2020/ept.json https://s3-us-west-2.amazonaws.com/usgs-lidar-public/IL_8County_B2_2020/ept.json |
Process Date/Time | 2024-04-08 00:00:00 |
Process Contact | Office for Coastal Management (OCM) |
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Catalog Details
Catalog Item ID | 72410 |
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Metadata Record Created By | Rebecca Mataosky |
Metadata Record Created | 2024-04-08 14:32+0000 |
Metadata Record Last Modified By | Rebecca Mataosky |
» Metadata Record Last Modified | 2024-07-31 17:46+0000 |
Metadata Record Published | 2024-04-08 |
Owner Org | OCMP |
Metadata Publication Status | Published Externally |
Do Not Publish? | N |
Metadata Workflow State | Published / External |
Metadata Last Review Date | 2024-04-08 |
Metadata Review Frequency | 1 Year |
Metadata Next Review Date | 2025-04-08 |
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