20171012
11392000
1.0
FGDC CSDGM Metadata
FALSE
Ramps_Intern1
3135997.622498
3172246.238525
1733749.263489
1789381.590515
1
002
0.912
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_Colorado_Central_FIPS_0502_Feet
<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/3.2.0'><WKT>PROJCS["NAD_1983_StatePlane_Colorado_Central_FIPS_0502_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",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",2232]]</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>102654</WKID><LatestWKID>2232</LatestWKID></ProjectedCoordinateSystem>
20250206
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1200
1200
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
GIS Specialist
303 455-1000
303 480-6790
1290 Broadway, Suite 700
Denver
CO
80203-5606
U.S.
geospatial@drcog.org
8am to 5pm US Mountain Time
ArcGIS Metadata
1.0
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
GIS Specialist
303 455-1000
303 480-6790
1290 Broadway, Suite 700
Denver
CO
80203-5606
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
DRCOG Sidewalk Ramps Point Feature (2016)
Enterprise Geodatabase Feature Class
0.912
2017-01-01
1.0
Denver Regional Council of Governments (DRCOG)
Denver Regional Council of Governments
Denver, CO
point digital data
Orthoimagery - 2016
DRCOG Denver Region Urbanized Project Area
Ramps_Intern1
This metadata describes the mapping updates of stereocompiled sidewalk ramps feature of DRCOG Denver Region Urbanized Project Area. The feature was compiled from DRCOG 2016 Orthophoto Mapping. This 1"=100' scale imagery is comprised of 4-band RGBIR color orthoimagery with a GSD (Ground Sample Distance) of 0.5'. Imagery was collected with a Vexcel Ultracam Eagle aerial sensor. Imagery is projected in 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.
To update the captured locations of sidewalk ramps. Ramps do not have to connect to other layers (e.g. sidewalk centerlines).
Josh Pendleton
Denver Regional Council of Governments (DRCOG)
GIS Specialist
303 455-1000
303 480-6790
1290 Broadway, Suite 700
Denver
CO
80203-5606
U.S.
geospatial@drcog.org
8am to 5pm US Mountain Time
Denver
Adams County
Denver County
Elbert County
Boulder County
Douglas County
Jefferson County
Colorado
Broomfield County
Arapahoe County
Weld County
DRCOG
softcopy stereocompilation
digital aerial image
sidewalk ramps
point data
Aerial Imagery
Denver
Adams County
Denver County
Elbert County
Boulder County
Douglas County
Jefferson County
Colorado
Broomfield County
Arapahoe County
Weld County
softcopy stereocompilation
digital aerial image
sidewalk ramps
point data
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
Contact DRCOG
-105.74031649
-104.02641939
39.21334647
40.29151847
Ground condition
2016-03-04
2016-06-22
Capture criteria: Digitize from aerial imagery (2D)
Esri ArcGIS 13.2.2.49743
1
-105.015664
-104.885233
39.999667
39.846356
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 2016 digital orthoimages as a backdrop to the sidewalk ramp point features.
There are no Attributes in this data set.
The horizontal accuracy of the delivered Edge of Pavement (EOP) lines features is a function of the aerotriangulation accuracy as expressed by the X and Y RMSE statistics of the ground control. DRCOG stated accuracy requirement (AppendixB_Feature Requirements_20151002.xlsx) 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 or, 3.0' horizontal accuracy. RMSE of the control is X = 0.138' and Y = 0.148'.
The Horizontal_Positional_Accuracy_Value was tested in accordance with Geospatial Positioning Accuracy Standards Part 3: National Standard for Spatial Data Accuracy (NSSDA), FGDC-STD-007.3-1998. NSSDA horizontal accuracy is 1.7308*RMSE_r or 1.7308*0.202 = 0.35'. NSSDA Horizontal accuracy of the aerotriangulated aerial imagery meets or exceeds the NMAS requirement of 1/30" for 1"100' scale mapping.
0.35
The sidewalk ramps were digitized in 2D from the aerial imagery and have no vertical attribute of accuracy value associated with X and Y values.
DWG files translated to ESRI Geodatabase format.
2017-01-01
DWG
GDB
New digital aerial imagery is collected concurrently with the lidar data and triangulated to provide stereo coverage of the project area in the desired coordinate system and datums. See orthoimage metadata for collection and processing details.
2017-01-01
IMG
IMG
VrOne files translated to DWG format.
2017-01-01
Ramp
DWG
Planimetric feature collection is performed in one or more of BAE SocetSet, ZI SSK, Cardinal VROne softcopy digital stereoscopic compilation workstations.
2017-01-01
IMG
Ramp
Editing of compiled features takes place in VrOne environment. Editing consists of layering validation, duplicate point removal, trimming lines, closing of lines, etc. points 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.
2017-01-01
Ramp
Ramp
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
None
None
Sanborn
raster digital data
Ground condition
2016-03-04
2016-06-22
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
2016-03-04
2016-06-22
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 DVD or by means of electronic delivery (email or posting to the FTP site for the client to download).
Edited Planimetric/Topographic Mapping
Ramp
1.0
None
None
Kucera International Inc.
DWG, Geodatabase
Ground condition
2017-01-01
Ramps_Intern1
Location of sidewalk ramps.
DRGOG
Feature Class
0
OBJECTID_12_13_14
OBJECTID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID_12
OBJECTID
Double
8
38
8
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
OBJECTID
OBJECTID
Double
8
38
8
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.
ID_NUM
ID Number
String
9
0
0
PRIMARY_ST
Primary Street
String
50
0
0
CROSS_ST
Cross Street
String
50
0
0
Ramps_Present
Ramps Present
Integer
4
10
0
NUM
Num
Integer
4
10
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
Ramp_ID_1
Ramp ID 1
String
50
0
0
Ramp_ID_2
Ramp ID 2
String
50
0
0
Ramp_ID_3
Ramp ID 3
String
50
0
0
Ramps_to_Add
Ramps To Add
Integer
4
10
0
Ramp_Type
Ramp Type
SmallInteger
2
5
0
Horiz_Gap
Horizontal Gap
SmallInteger
2
5
0
Vert_Discon
Vertical Discontinuities
SmallInteger
2
5
0
Counter_Slope
Gutter Counter Slope
SmallInteger
2
5
0
Ramp_Run
Ramp Running Slope
String
50
0
0
Ramp_Cross
Ramp Cross Slope
SmallInteger
2
5
0
Turn_Space_Slope
Turn Space Slope
SmallInteger
2
5
0
Turn_Space_Dimension
Turn Space Dimension
SmallInteger
2
5
0
Ramp_Width
Ramp Width
SmallInteger
2
5
0
Clear_Space
Clear Space
Integer
4
10
0
Flared_Sides
Flared Sides
SmallInteger
2
5
0
DWS_Present
Detecable Warning - Present
SmallInteger
2
5
0
DWS_Orientation
Detecable Warning - Orientation
SmallInteger
2
5
0
DWS_Contrast
Detecable Warning - Contrast
SmallInteger
2
5
0
GIS_ID
GIS ID
Integer
4
10
0
GlobalID
GlobalID
GlobalID
38
0
0
Inspected
Inspected
String
5
0
0
Inspection_Date
Inspection Date
Date
8
0
0
Inspected_By
Inspected By
String
50
0
0
Priority_Ranking
Priority Ranking
String
10
0
0
Survey_Date
Survey Date
Date
8
0
0
Survey_By
Survey By
String
50
0
0
Surveyed
Surveyed
String
5
0
0
RAMP_ID
RAMP ID
String
10
0
0
Comments_1
Comments
String
255
0
0
ID_NUM_1
ID_NUM
String
255
0
0
PRIMARY_ST_1
PRIMARY_ST
String
255
0
0
CROSS_ST_1
CROSS_ST
String
255
0
0
NUM_1
NUM
Double
8
38
8
Ramps_Present_1
Ramps_Present
String
255
0
0
Ramps_to_Add_1
Ramps_to_Add
String
255
0
0
Ramp_ID_12
Ramp_ID_1
String
255
0
0
Ramp_ID_23
Ramp_ID_2
String
255
0
0
Ramp_ID_34
Ramp_ID_3
String
255
0
0
Ramp_Type_1
Ramp_Type
String
255
0
0
ObjectID_1
ObjectID_1
Integer
4
10
0
ID_NUM_12
ID_NUM
String
255
0
0
PRIMARY_ST_12
PRIMARY_ST
String
255
0
0
CROSS_ST_12
CROSS_ST
String
255
0
0
Ramp_ID_12_13
Ramp_ID_1
String
255
0
0
Ramp_ID_23_24
Ramp_ID_2
String
255
0
0
Ramp_ID_34_35
Ramp_ID_3
String
255
0
0
Ramp_Type_12
Ramp_Type
String
255
0
0
ObjectID_12_13
ObjectID_1
Integer
4
10
0
DWS_Dimensions
Detecable Warning - Dimensions
SmallInteger
2
5
0
dataset
EPSG
5.3(9.0.0)
0
Simple
FALSE
0
TRUE
FALSE
20250206