20260525
00263700
1.0
North American Profile of ISO19115 2003
FALSE
Planimetrics_2024_TrailsCenterline
3027872.000000
3310416.528503
1541853.267000
1866005.454500
1
002
0.000
Projected
GCS_NAD_1983_2011
Linear Unit: Foot_US (0.304801)
NAD_1983_2011_StatePlane_Colorado_Central_FIPS_0502_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/3.3.0'><WKT>PROJCS["NAD_1983_2011_StatePlane_Colorado_Central_FIPS_0502_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",38.45],PARAMETER["Standard_Parallel_2",39.75],PARAMETER["Latitude_Of_Origin",37.83333333333334],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",6428]]</WKT><XOrigin>-118767900</XOrigin><YOrigin>-94525500</YOrigin><XYScale>3048.0060960121928</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333331</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>103013</WKID><LatestWKID>6428</LatestWKID></ProjectedCoordinateSystem>
20260727
17185200
20260727
17185200
1200
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
Senior GIS Specialist
303-480-6784
303 480-6790
1001 17th Street
Denver
CO
80202
U.S.
geospatial@drcog.org
8am to 5pm US Mountain Time
2024
ArcGIS Metadata
1.0
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
Senior GIS Specialist
303-480-6784
303 480-6790
1001 17th Street
Denver
CO
80202
U.S.
geospatial@drcog.org
8am to 5pm US Mountain Time
Contact resellers
Order from either Map Mart or Colorado Aerial Photo Service
Geodatabase
ArcGIS 10.1
ESRI
Enterprise Geodatabase Feature Class
0.000
DRCOG Unpaved Trails Centerlines Line Feature (2024)
2025
1.0
Denver Regional Council of Governments (DRCOG)
Denver Regional Council of Governments
Denver, CO
vector digital data
DRCOG Planimetric Project
2024
Unpaved trail centerlines delineated from 2024 aerial imagery. CAPTURE CRITERIA: Trail centerlines are compiled in 2D. This feature includes centerlines for unpaved trails with a width greater than 5 feet and less than 9 feet. If the trail widens and the centerline shifts, a "jig" is created to keep the centerline connected (just as with centerline sidewalks). This layer connects to the sidewalk centerline layer when appropriate. The primary focus of the collection is on public recreational trails; however, private trails may also be included as the collection was performed purely based on visual inspection of ortho imagery. This dataset can be used to supplement the sidewalk centerlines dataset but keep in mind that unpaved trail centerlines may be private features. CHANGE FEATURES: This dataset is an update to previously collected data. Features were originally delineated from 2014 aerial imagery, updated in 2016, 2018, 2020, 2022 and then again in 2024 to create this dataset. Examples of change that are captured include but are not limited to: new features, change in attribution, and modifications that reach or exceed the threshold for initial collection of this feature. Additions refer not only to truly new features in the built environment but also to features that are added based on a larger extent of capture. Please refer to extent shapefiles for 2014, 2016, 2018, 2020, 2022 and 2024 feature captures before doing change analysis. Modifications are marked even if only a small portion of the feature has been changed. A separate change layer is available to show only those features that were delineated in 2024. SOURCE DATA: This feature was compiled from DRCOG 2024 Denver Regional Aerial Photography Project (DRAPP) imagery. This imagery is 4-band RGBIR color orthoimagery with a GSD (Ground Sample Distance) of 0.5 foot for 3-inch imagery, 1 foot for 6-inch imagery, and 2 feet for 12-inch imagery. Imagery was collected in the spring with a Vexcel Ultracam Eagle aerial sensor. Imagery is projected in the State Plane Coordinate System, Colorado Central Zone using the Lambert Conformal Conic map projection parameters. Horizontal and vertical datums are NAD83(11) and NAVD88(GEOID12A), respectively.
Unpaved trail centerlines delineated from 2024 aerial imagery.
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
Senior GIS Specialist
303-480-6784
303 480-6790
1001 17th Street
Denver
CO
80202
U.S.
geospatial@drcog.org
8am to 5pm US Mountain Time
Denver
Colorado
Adams County
Arapahoe County
Boulder County
Broomfield County
Denver County
Douglas County
Jefferson County
DRCOG
Softcopy stereocompilation
Digital Aerial Image
Vector Data
Unpaved Trails Centerlines
Built Environment
Natural Environment
DRCOG
Regional Planimetrics
Transportation
Aerial Imagery
Softcopy stereocompilation
Digital Aerial Image
Vector Data
Unpaved Trails Centerlines
Built Environment
Natural Environment
DRCOG
Regional Planimetrics
Transportation
Denver
Colorado
Adams County
Arapahoe County
Boulder County
Broomfield County
Denver County
Douglas County
Jefferson County
This data is provided for free public download from DRCOG’s Regional Data Catalog. Please see the terms and conditions on the site for more information about use. THE DATA PROVIDED BY DRCOG IS ON AN “AS IS” BASIS. DRCOG MAKES NO REPRESENTATIONS OR WARRANTY AS TO THE COMPLETENESS, ACCURACY, TIMELINESS, OR CONTENT OF ANY DATA MADE AVAILABLE THROUGH THIS SITE. DRCOG EXPRESSLY DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
This data is intended for informational purposes only. DRCOG provides this information on an "as is" basis and makes no guarantee, representation or warranty, either express or implied, that the data will be error free. DRCOG further makes no guarantees, representations or warranties, either express or implied, as to the completeness, accuracy or correctness of the data, or as to merchantability or fitness of the data for a particular use or purpose. DRCOG is not responsible to any user for any costs, expenses, liabilities or damages arising from inconsistencies in its data or from any use of the information.
Contact DRCOG
true
-105.401478
-104.388780
40.210939
39.315982
Ground condition
2024-02-23
2024-07-09
```The 2024 Regional Planimetric Project was funded by Arapahoe County, City and County of Denver, Jefferson County, City of Arvada, City or Aurora, Town of Bennett, City of Boulder, Town of Castle Rock, City of Dacono, Town of Erie, Town of Frederick, City of Golden, City of Greenwood Village, City of Littleton, Town of Morrison, City of Wheat Ridge, South Metro Fire Rescue, Mile High Flood District, Prospect Recreation and Park District, and the Denver Regional Council of Governments.
Esri ArcGIS 13.3.0.52636
1
-105.401478
-104.388780
40.210939
39.315982
Visual comparison of the source data against orthophotos of the corresponding area on an interactive computer graphic system.
Compliance with the collection and accuracy standard was ensured by the placement of GPS ground control prior to the acquisition of aerial imagery. A softcopy aerotriangulation adjustment is performed on the aerial imagery is Leica XPro software. Accuracy of the stereo compiled features is a function of the aerotriangulation accuracy as summarized by the X, Y, Z RMSE statistics of the ground control points.
Completeness is ensured in the final vector editing process by comparison to the 2024 digital orthoimages as a backdrop to the unpaved trails centerlines vector features.
The horizontal accuracy of the delivered Unpaved Trails Centerlines Line features is dependent upon the quality of the aerotriangulation (AT) bundle adjustment which georeferences the aerial imagery from which features are mapped. DRCOG stated accuracy requirement is National Map Accuracy Standard (NMAS) for 1"=100' scale mapping. NMAS accuracy for map scales larger than 1:20000 horizontal tolerance is 1/30" for 90% of well defined points. The horizontal component of the AT meets or exceeds accuracy standards in accordance with Geospatial Positioning Accuracy Standards Part 3: National Standard for Spatial Data Accuracy (NSSDA), FGDC-STD-007.3-1998.
The unpaved trails centerlines were digitized in 2D from the aerial imagery and have no vertical attribute of accuracy value associated with X and Y values.
New digital aerial imagery captured by Sanborn to provide stereo coverage of the project area in the desired coordinate system and datums. This imagery is owned and provided to Kucera by DRCOG. See orthoimage metadata for collection and processing details.
2024
IMG
IMG
Planimetric feature collection is performed in one or more of BAE SocetSet, ZI SSK, Cardinal VROne softcopy digital stereoscopic compilation workstations.
2025
IMG
Cntrln_trails
Editing of compiled features takes place in VrOne environment. Editing consists of layering validation, duplicate point removal, trimming lines, closing of lines, etc. Vectors are compared to ortho product to validate geometric accuracy. All compilation is cut to project boundary. Where lines intersect project boundary the lines are trimmed at the boundary.
2025
Cntrln_trails
Cntrln_trails
VrOne files translated to DWG format.
2025
Cntrln_trails
DWG
DWG files translated to ESRI Geodatabase format.
2025
DWG
GDB
The aerial imagery was captured by Sanborn using a Vexcel Ultracam Eagle aerial sensor. This imagery is owned and provided to Kucera by DRCOG.
1200
Aerial imagery
IMG
1.0
Sanborn
None
None
raster digital data
Ground condition
2024-02-23
2024-07-09
Aerotriangulated digital aerial imagery is used to compile surface planimetric features in a softcopy stereo environment. Software used are BAE SocetSet, ZI SSK and Cardinal VROne.
1200
Aerial imagery
IMG
1.0
Sanborn
None
None
raster digital data
Ground condition
2024-02-23
2024-07-09
the map editing process performs the same two functions for the planimetric and topographic data, which is; 1. to check the data for accuracy, and 2. make the mapping more aesthetically pleasing and easy to work with. The various map features are assigned unique digital layers according to Kucera's general layering scheme (or a more "custom" layering scheme if specified by the client). "Layering" meaning the separation of like features to a unique digital level that can be viewed, located, counted or otherwise manipulated to the exclusion of other features/levels. Planimetrically, a good example of the layering system would be that all of the major buildings such as houses and commercial buildings be placed on their own layer named something like "BUILDINGS" so they can more easily be viewed or worked separately from more inconsequential structures such as small storage buildings or sheds that would be own their own layer named "MINOR BUILDINGS" or whatever the client would like those particular layers named. Other planimetric examples of the use of layering would be the use of separate digital layers to differentiate paved roads from unpaved roads, treelines from brushlines, ditches from streams, etc. The finished mapping is then usually gridded, the appropriate title block information is added (info regarding the scale, contour interval, mapping location, client name, date of photography or Lidar collection, etc...), translated from Kucera's in-house editing software - primarily VrOne - into the digital format and layering scheme requested by the client (usually AutoCAD and/or ESRI) and delivered to the client on a usb drive or by means of electronic delivery (email or posting to the file hosting site for the client to download).
Edited Planimetric/Topographic Mapping
Cntrln_trails
1.0
Kucera International Inc.
None
None
DWG, Geodatabase
Ground condition
2025
CntrlnTrails
Centerline of unpaved trails.
DRGOG
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.
CreateDate
Date attribute is created.
DRCOG
mm/dd/yyyy
Month, day and year the feature entity is created
DRCOG
CreateDate
Date
8
0
0
CreateUser
Kucera International, Inc.
DRCOG
Kucera International, Inc.
Name of vendor creating the entity feature
DRCOG
CreateUser
String
32
0
0
Comments
Text that explains anything a user needs to know to interpret how or why the feature was delineated, if not obvious according to the capture criteria.
DRGOG
Plain text.
Comments
String
100
0
0
Update_Sta
Update_Sta
String
2
0
0
Unique_ID
Unique ID, can be randomly generated
DRCOG
Unique ID assigned to individual features
Unique ID assigned to individual features
DRCOG
Unique_ID
Integer
4
10
0
SHAPE_STLe
SHAPE_STLe
Double
8
38
8
Shape.STLength()
Shape.STLength()
Double
0
0
0
dataset
EPSG
8.2.10(10.3.1)
0
Simple
FALSE
0
TRUE
FALSE