NV5 Geospatial
541-752-1204
1100 Circle Blvd. Suite 126
Corvallis
Oregon
97330
US
http://www.nv5.com/geospatial
20240829
ArcGIS Metadata
1.0
10.913
Lindsey Danforth
City of Boulder
1301 Arapahoe Ave
Boulder
Colorado
80301
US
303-441-3388
Lindsey Danforth
Enterprise Geodatabase Feature Class
2023-04-06
vector digital data
LiDAR2020Contours
NV5 Geospatial
541-752-1204
1100 Circle Blvd. Suite 126
Corvallis
Oregon
97330
US
http://www.nv5.com/geospatial
NV5 Geospatial
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This shapefile represents 1 ft. contours based on Lidar-derived terrain elevation data of the City of Boulder 2020 Data Reporcess dataset. Bridge and waters edge breaklines provided by the City of Boulder were used to enforced contour elevations. The horizontal datum for this dataset is NAD83 2011, the vertical datum is NAVD88 Geoid 18, and the data is projected in Colorado State Plane North. Units are in US Survey Feet. NV5 Geospatial collected the City of Boulder 2020 Data Reporcess dataset for City of Boulder between 05/29/20 - 08/03/20. In areas of steep slopes the contour interval precludes the generation of topologically correct contours and some overlap may be seen due to the rapid elevation change in XY space. </SPAN></P></DIV></DIV></DIV>
Provide high resolution terrain elevation data from the City of Boulder 2020 Data Reporcess dataset.
City of Boulder
Boulder
Colorado
Lidar, Contours, Shapefile
Contours
Lidar-derived
Shapefile
Boulder
Colorado
Esri ArcGIS 10.3 - 10.7
This data is projected in Colorado State Plane North.
1
-105.337025
-105.334823
39.886525
39.884763
2020-05-29
2020-08-03
City of Boulder 2020 Data Reporcess Lidar
8027.000000
8452.000000
Lindsey Danforth
City of Boulder
1301 Arapahoe Ave
Boulder
Colorado
80301
US
303-441-3388
Lindsey Danforth
Please contact City of Boulder for information regarding the use of this data.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>LAS version 1.4 files can store a maximum of 15 returns per outgoing pulse. In the event the total return count exceeds this limitation, the true last return which generally exists as ground in the dataset is preserved as the 15/15th return, with all other returns consolidated to 14/15th returns.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
Acquisition. NV5 Geospatial did not aquire the City of Boulder 2020 Data Lidar data. The orginal data survey was completed between 05/29/20 - 08/03/20.
2020-08-03T00:00:00
1. Calibration and vertical accuracy assement of the 2020 datset was completed before NV5 Geospatial's receipt of the data.
2023-04-06T00:00:00
Processing notes specific to contour dataset:
Contour generation from lidar point data required a thinning operation in order to reduce contour sinuosity. The thinning operation reduced point density where topographic change is minimal (i.e., flat surfaces) while preserving resolution where topographic change was present. Model key points were selected from the ground model every 20 feet with the spacing decreased in regions with high surface curvature. Generation of model key points eliminated redundant detail in terrain representation, particularly in areas of low relief, and provided for a more manageable dataset. Contours were produced through TerraModeler by interpolating between the model key points at even elevation increments. In some areas of steep slopes the contour interval precluded the generation of topologically correct contours and some overlap may be seen due to the rapid elevation change in XY space. A shapefile of these steep slope areas has been provided as reference.
2023-04-06T00:00:00
1.0
500000
5000
FGDC
20240829
12362000
LiDAR2020Contours
3045735.118774
3046352.000000
1200912.331086
1201553.000000
1
10.913
Projected
GCS_NAD_1983_2011
Linear Unit: Foot_US (0.304801)
NAD_1983_2011_StatePlane_Colorado_North_FIPS_0501_Ft_US
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.1.0'><WKT>PROJCS["NAD_1983_2011_StatePlane_Colorado_North_FIPS_0501_Ft_US",GEOGCS["GCS_NAD_1983_2011",DATUM["D_NAD_1983_2011",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",3000000.000316083],PARAMETER["False_Northing",999999.999996],PARAMETER["Central_Meridian",-105.5],PARAMETER["Standard_Parallel_1",39.71666666666667],PARAMETER["Standard_Parallel_2",40.78333333333333],PARAMETER["Latitude_Of_Origin",39.33333333333334],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",6430]]</WKT><XOrigin>-118265500</XOrigin><YOrigin>-95180100</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>103012</WKID><LatestWKID>6430</LatestWKID></ProjectedCoordinateSystem>
20240829
12362000
20130417
08405800
FGDC CSDGM Metadata
FALSE
dataset
EPSG
8.2.10(10.3.1)
Simple
FALSE
0
TRUE
TRUE
Lidar-derived Contour
NV5 Geospatial
LiDAR2020Contours
Feature Class
0
OBJECTID
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
Esri
Coordinates defining the features.
STEEPSTYLE
Steep Style
SmallInteger
2
5
0
FLATSTYLE
Flat Style
SmallInteger
2
5
0
Elevation
Elevation
Elevation
NV5 Geospatial
Elevation in US Survey Feet, NAVD88 Geoid 18
SmallInteger
2
5
0
Shape.STLength()
Shape.STLength()
Double
0
0
0
0