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This page last updated: 2010
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| Originator | International Water Institute |
| Abstract | This LiDAR data is the result of private and government entities working together under the guidance of the International Water Institute (IWI) regarding the Red River Basin Mapping Initiative (RRBMI). The USACE St Louis District was one of the major contributors in this funding effort. Fugro Horizons Inc in cooperation with North West Geomatics, and Fugro EarthData acquired LiDAR with Leica sensor ALS50-II MPiA for the Red River Basin. The Red River Basin covers ND, MN, SD and flows into Canada. The US Red River Basin boundary covers 40,860 sq, with add-on counties is approximately 47,100 sq miles. Acquisition was planned between spring 2008 and Spring 2010. LiDAR sensor settings included acquisition at 8,000' AMT, 45 degree field of view, 6,626ft swath width, maximum along track spacing (occurs at FOV edge) of 2.56m in overlap areas, maximum cross track spacing (occurs at Nadir) 2.16 meter, average post spacing of 1.35m, point density (average) of 0.55 points per square meter, and area/point (average) of 1.82 m^2. This sensor was also equipped with IPAS inertial measuring unit (IMU) and a dual frequency airborne GPS receiver. Color film was acquired at 17,500' AMT and its accuracy can support 0.5m ortho photography. Final deliverables for the LiDAR are in UTM zone 14 coordinate system NAD83(CORS96) NAVD88 Geod03 meters tiled 2,000m x 2,000m with an XY naming convention. *******DELIVERABLES***** *** BareEarth - Contains bare earth class 2, keypoints class 8, and red river class 9. LAS files have a leading 'B' identifier *** First_returns - Contains LiDAR first return LAS files with a leading 'F' identifier *** Flight Logs and jpgs *** Grids_ascii - 1m Arc Grid created from key points bare earth LiDAR with a leading 'A' identifier *** Grids_integer - 1m Arc Grid, z in centimeters created from Grids_ascii with a leading 'g' identifier *** Hybrid - Hybrid 1m pixel B/W tiffs with georeferencing created from LiDAR intensity and Raw LiDAR/hillshade, leading 'H' identifier *** Metadata - Contains metadata file(s) *** processing_report - Includes RMSE's and acquisition details *** Raw - Raw LiDAR corrected to ground LAS files with a leading 'R' identifier Intensity data and return will be included 2-ground, 6-building, 8 model keypoint, 9- water conditional on breaklines, 12 - overlap *** Film AT Report *** Survey Report Blocks ABCD Detail - Surveyor field notes and pictures of controlpoints |
| Browse Graphic | View a sample of the data. |
| Time Period of Content Date | |
| Currentness Reference | ACQUISITION DATES BASED ON 'PLANNED' BLOCK DIAGRAM FROM SPRING 2008 LiDAR Block A - 4-19-08 to 5-2-08 LiDAR Block B - 4-18-08 to 4-19-08 LiDAR Block C - 4-21-08 to 5-16-08 LiDAR Block D- 5-3-08 to 5-18-08, 5-11-09 to 5-15-09 LiDAR Block E - 5-3-08 to 5-14-08, 11-21-08, 5-21-09 to 5-23-09 LiDAR Block F - 5-15-08 to 5-18-08, 11-21-08 to 11-25-08, 5-23-09 to 5-27-09 LiDAR Block G - 4-29-08 to 5-20-08 LiDAR Block H - 4-29-08 to 5-18-08 LiDAR Block I - 4-25-09 to 5-30-09 LiDAR Block J - 4-25-09 to 5-17-09 LiDAR Block K - 4-21-09 to 5-30-09 LiDAR Block L - 4-21-09 to 4-23-09 LiDAR Block M - 5-4-09 to 5-17-09 LiDAR Block N - 10-29-08 to 11-3-08, 5-27-09 to 5-29-09 LiDAR Block O - 10-28-08 to 11-1-08 LiDAR Block Lake of the Woods - 5-17-09 LiDAR Block Koochiching - 5-17-09 to 5-30-09 LiDAR Block Big Stone - Spring 2010 Film Blocks ABCD - 4-18-08 to 5-18-08, 5-10-09 to 5-17-09 |
| Access Constraints | There are no limitations for access. |
| Use Constraints | None other than the International Water Institute asks to be credited in any derived products or services. |
| Distributor Organization | International Water Institute |
| Ordering Instructions | Contact Distributor |
| Online Linkage | Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" in Section 6 of this metadata. |
Go to Section:
1. Identification Information
2. Data Quality Information
3. Spatial Data Organization Information
4. Spatial Reference Information
5. Entity and Attribute Information
6. Distribution Information
7. Metadata Reference Information
| Section 1 | Identification Information | Top of page | ||
| Originator | International Water Institute | |||
| Title | IWI Red River Basin Mapping 2008-2010 - LiDAR | |||
| Abstract | This LiDAR data is the result of private and government entities working together under the guidance of the International Water Institute (IWI) regarding the Red River Basin Mapping Initiative (RRBMI). The USACE St Louis District was one of the major contributors in this funding effort. Fugro Horizons Inc in cooperation with North West Geomatics, and Fugro EarthData acquired LiDAR with Leica sensor ALS50-II MPiA for the Red River Basin. The Red River Basin covers ND, MN, SD and flows into Canada. The US Red River Basin boundary covers 40,860 sq, with add-on counties is approximately 47,100 sq miles. Acquisition was planned between spring 2008 and Spring 2010. LiDAR sensor settings included acquisition at 8,000' AMT, 45 degree field of view, 6,626ft swath width, maximum along track spacing (occurs at FOV edge) of 2.56m in overlap areas, maximum cross track spacing (occurs at Nadir) 2.16 meter, average post spacing of 1.35m, point density (average) of 0.55 points per square meter, and area/point (average) of 1.82 m^2. This sensor was also equipped with IPAS inertial measuring unit (IMU) and a dual frequency airborne GPS receiver. Color film was acquired at 17,500' AMT and its accuracy can support 0.5m ortho photography. Final deliverables for the LiDAR are in UTM zone 14 coordinate system NAD83(CORS96) NAVD88 Geod03 meters tiled 2,000m x 2,000m with an XY naming convention. *******DELIVERABLES***** *** BareEarth - Contains bare earth class 2, keypoints class 8, and red river class 9. LAS files have a leading 'B' identifier *** First_returns - Contains LiDAR first return LAS files with a leading 'F' identifier *** Flight Logs and jpgs *** Grids_ascii - 1m Arc Grid created from key points bare earth LiDAR with a leading 'A' identifier *** Grids_integer - 1m Arc Grid, z in centimeters created from Grids_ascii with a leading 'g' identifier *** Hybrid - Hybrid 1m pixel B/W tiffs with georeferencing created from LiDAR intensity and Raw LiDAR/hillshade, leading 'H' identifier *** Metadata - Contains metadata file(s) *** processing_report - Includes RMSE's and acquisition details *** Raw - Raw LiDAR corrected to ground LAS files with a leading 'R' identifier Intensity data and return will be included 2-ground, 6-building, 8 model keypoint, 9- water conditional on breaklines, 12 - overlap *** Film AT Report *** Survey Report Blocks ABCD Detail - Surveyor field notes and pictures of controlpoints |
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| Purpose | International Water Institute strives to develop partnerships to leverage the planned acquisition of LiDAR and imagery to better meet state, local, and federal needs and generate a freely accessible seamless high-resolution digital elevation model for the US portion of the Red River of the North Basin. One of the products of this effort is 1.4m average post spacing LiDAR and its derivatives. Imagery was collected for the main corridor of the basin for future utilization. | |||
| Time Period of Content Date | ||||
| Currentness Reference | ACQUISITION DATES BASED ON 'PLANNED' BLOCK DIAGRAM FROM SPRING 2008 LiDAR Block A - 4-19-08 to 5-2-08 LiDAR Block B - 4-18-08 to 4-19-08 LiDAR Block C - 4-21-08 to 5-16-08 LiDAR Block D- 5-3-08 to 5-18-08, 5-11-09 to 5-15-09 LiDAR Block E - 5-3-08 to 5-14-08, 11-21-08, 5-21-09 to 5-23-09 LiDAR Block F - 5-15-08 to 5-18-08, 11-21-08 to 11-25-08, 5-23-09 to 5-27-09 LiDAR Block G - 4-29-08 to 5-20-08 LiDAR Block H - 4-29-08 to 5-18-08 LiDAR Block I - 4-25-09 to 5-30-09 LiDAR Block J - 4-25-09 to 5-17-09 LiDAR Block K - 4-21-09 to 5-30-09 LiDAR Block L - 4-21-09 to 4-23-09 LiDAR Block M - 5-4-09 to 5-17-09 LiDAR Block N - 10-29-08 to 11-3-08, 5-27-09 to 5-29-09 LiDAR Block O - 10-28-08 to 11-1-08 LiDAR Block Lake of the Woods - 5-17-09 LiDAR Block Koochiching - 5-17-09 to 5-30-09 LiDAR Block Big Stone - Spring 2010 Film Blocks ABCD - 4-18-08 to 5-18-08, 5-10-09 to 5-17-09 |
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| Progress | Complete | |||
| Maintenance and Update Frequency | Irregular | |||
| Spatial Extent of Data | Red River of the North Drainage Basin in North Dakota, South Dakota, and Minnesota. | |||
| Bounding Coordinates | -100.6470 -093.8852 49.112226 45.454503 |
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| Place Keywords | South Dakota, North Dakota, Minnesota, Red River of the North Drainage Basin | |||
| Theme Keywords | Elevation, LiDAR Acquisition, LiDAR, LiDAR 1.4m, Film, Imagery, International Water Insitute, RRBMI Red River Basin Mapping Initiative | |||
| Theme Keyword Thesaurus | ISO 19115 Topic Categories | |||
| Access Constraints | There are no limitations for access. | |||
| Use Constraints | None other than the International Water Institute asks to be credited in any derived products or services. | |||
| Contact Person Information | Charles Fritz,
Director International Water Institute North Dakota State University, Dept 9030, PO Box 6050 Fargo, ND 58108-6050 Phone: 701.231.9747 FAX: 701.231.5613 E-mail: charles.fritz@ndsu.edu | |||
| Browse Graphic | View a sample of the data. | |||
| Browse Graphic File Description | Graphic outlining geographic location of data acquisition blocks referenced in Currentness Reference | |||
| Associated Data Sets | Imagery collection along Red River mainstem collected in association with this project is described in http://www.mngeo.state.mn.us/chouse/metadata/iwi_rrbmi_08_10_imagery.html |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | GPS phase data was post processed with continuous kinematic survey techniques using 'On the Fly' (OTF) integer ambiguity resolution. The GPS data was processed with forward and reverse processing algorithms. The results from each process, using the data collected at the airport and in project area, were combined to yield a single fixed integer phase differential solution of the aircraft trajectory. The differences between the forward to reverse solution within the project area were within project specifications, indicating a valid and accurate solution. An IMU was used to record precise changes in position and orientation of the LIDAR scanner at a rate of 200 Hz. All IMU data was processed post flight with a filter to integrate inertial measurements and precise phase differential GPS positions. The resulting solution contains geodetic position, omega, phi, kappa, and time for subsequent merging with the laser ranging information. |
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| Logical Consistency | Tiling is based on the UTM14 coordinates. | |||
| Completeness | Complete | |||
| Horizontal Positional Accuracy | RMSE 1m | |||
| Vertical Positional Accuracy | Bare Earth 15cm RMSE | |||
| Lineage | AeroScan LiDAR timed reflection data and the IMU SOL files were processed together using LiDAR processing software. The data set for each flight line was checked for project area coverage, data gaps between overlapping flight lines, and tension/compression areas (areas where data points are more or less dense that the average project specified post spacing). Using an iterative process that involves analyzing raster difference calculations the omega, phi, kappa angle corrections for the LiDAR instrument were determined. Corrections were applied to the LiDAR data set. Extensive comparisons were made of vertical and horizontal positional differences between points common to two or more LiDAR flight lines. An intensity raster for each flight line was generated and verified that intensity was recorded for each LiDAR point. LiDAR ground points were compared to independently surveyed and positioned ground control points at both the airport bore-sight area and the project area. Based on the results of these comparisons, the LiDAR data was vertically biased to the ground. (1) PRE-PROCESSING STAGE LiDAR, GPS and IMU data are processed together using LiDAR processing software. The LiDAR data set for each flight line is checked for project area coverage and LiDAR post spacing is checked to ensure it meets project specifications. The LiDAR collected at the calibration area is used to correct the rotational, atmospheric, and vertical elevation differences that are inherent to LiDAR data. Intensity raster is generated to verify that intensity was recorded for each LiDAR point. LiDAR data is transformed to the specified project coordinate system. By utilizing the ground survey data collected at the calibration site and project area, the LiDAR data is vertically biased to the ground. Comparisons between the biased LiDAR data and ground survey data within the project area are evaluated and a final RMSE value is generated to ensure the data meets project specifications. LiDAR data in overlap areas of project flight lines is removed and data from all swaths is merged into a single data set. The data set is trimmed to the digital project boundary including an additional buffer zone, which is typically about 50 feet (buffer zone assures adequate contour generation from the DEM). The resulting data set is referred to as the raw LiDAR data. (2) SURFACING STAGE The raw LIDAR data is processed through a minimum block mean algorithm and points are classified as either bare earth or non-bare earth. User developed 'macros' that factor mean terrain angle and height from the ground are used to determine bare earth point classification. The next phase of the surfacing process is a 2D edit procedure that ensures the accuracy of the automated feature classification. Editors use a combination of imagery, intensity of the LiDAR reflection and tin-editing software to assess points. The LiDAR data is filtered, as necessary, using a quadric error metric to remove redundant points. This method leaves points where there is a change in the slope of surfaces (road ditches) and eliminates points from evenly sloped terrain (flat field) where the points do not affect the surface. The resulting data set is referred to as 'preliminary bare-earth LiDAR' and is 2D surfaced and filtered as necessary. This data set is accurate for 5’ contours orpreliminary 2’ contours. (3) 2D EDIT STAGE ( ONLY IF OPTIONAL 5.2.1 IS SELECTED AND NEGOTIATED AS A COST AND DELIVERABLE) The 2D surfaced bare-earth LiDAR data. Data points still present on structures or vegetation are removed and LiDAR data erroneously removed during the surfacing process can be replaced. |
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| Source Scale Denominator | ||||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | ||||
| Geographic Reference for Tabular Data | ||||
| Spatial Object Type | ||||
| Vendor Specific Object Types | ||||
| Tiling Scheme | ||||
| Section 4 | Spatial Reference Information | Top of full metadata | Top of page | |
| Horizontal Coordinate Scheme | UTM | |||
| Ellipsoid | Geodetic Reference System 80 (GRS 80) | |||
| Horizontal Datum | ||||
| Horizontal Units | Meters | |||
| Distance Resolution | ||||
| Altitude Datum | North American Vertical Datum of 1988 | |||
| Altitude Units | Meters | |||
| Depth Datum | No correction | |||
| Depth Units | Meters | |||
| Cell Width | .001 | |||
| Cell Height | .001 | |||
| UTM Zone Number | 14 | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | 1.4m LiDAR Acquisition and Processing for International Water Institue, Fargo ND 2008-2010. |
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| Entity and Attribute Detailed Citation | ||||
| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | RRBMI Red River Basin Mapping Initiative | |||
| Publication Date | 2010 | |||
| Contact Person Information | Charles Fritz Director International Water Institute North Dakota State University, Dept 9030, PO Box 6050 Fargo, North Dakota 58108-6050 Phone: 701.231.9747 FAX: 701.231.5613 E-mail: charles.fritz@ndsu.edu |
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| Distributor's Data Set Identifier | iwi_rrbmi_8_10_lidar | |||
| Distribution Liability | In no event shall the creators, custodians, or distributors of this information be liable for any damages arising out of its use (or the inability to use it). | |||
| Transfer Format Name | ||||
| Transfer Format Version Number | ||||
| Transfer Size | ||||
| Ordering Instructions | Contact Distributor | |||
| Online Linkage | Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" above. | |||
| Section 7 | Metadata Reference Information | Top of full metadata | Top of page | |
| Metadata Date | 2010 | |||
| Contact Person Information | ,
North Dakota State University, Dept 2850, PO Box 6050 Fargo, ND 58108-6050 Phone: 701.231.5266 FAX: E-mail: none available |
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| Metadata Standard Name | ||||
| Metadata Standard Version | FGDC-STD-001-1998 | |||
| Metadata Standard Online Linkage | none available||||
This page last updated: 2010