Merrick & Co
20190508
DEM
raster digital data
A two-foot (2ft) cell size Digital Elevation Model (DEM) raster was created from the ground classified lidar points plus the breaklines. The files are delivered in tile format (3000ft by 3000ft), The rasters are delivered in GeoTIFF format (.tif).
LiDAR terrain mapping to the Colorado Water Conservation Board (CWCB) for all or portions of Weld, Morgan, Adams, Arapahoe, Denver, Douglas, Elbert, El Paso, Lincoln, Pueblo, Otero, Las Animas, and Huerfano Counties. Represents a high-resolution data set of lidar for an Area of Interest (AOI) totaling approximately 18,348.89 square miles. The Colorado Central AOI requires Quality Level Two (QL2) deliverable products and is approximately 7234 square miles and 22809 3000 by 3000ft tiles.
Raster File Type = TIFF
Bit Depth/Pixel Type = 32-bit float
Raster Cell Size = 2.0 United States Survey Feet
Interpolation or Resampling Technique = Triangulated Irregular Network (TIN)
Required Vertical Accuracy = 19.6cm NVA
20180506
20180725
ground condition
Unknown
-105.075512
-103.128354
39.753632
38.496304
3121452.77716659
3666973.68682025
1699679.26687524
1250008.42450951
None
Breaklines
Elevation Data
Lidar
DEM
Intensity
None
Eastern Colorado
No restrictions apply to these data.
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Data covers the entire area specified for this project.
The dataset was reviewed to ensure completeness and 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.
Using MARS software a two-foot (2ft) 32-bit floating point DEM raster in GeoTIFF format was created using the ground classified lidar points along with the breaklines. The files are delivered in 3000ft by 3000ft tiles.
20190211
Raster
Pixel
1500
1500
State Plane Coordinate System 1983
0502
38.450000
39.750000
-105.500000
37.833333
3000000.000316
999999.999996
row and column
2
2
survey feet
D_NAD_1983_2011
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum of 1988 Geoid12B
0.001
feet
Explicit elevation coordinate included with horizontal coordinates
20190508
Merrick & Co
mailing and physical address
5970 Greenwood Plaza Blvd
Greenwood Village
CO
80111
USA
303-353-3903
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998