Denver Regional Council of Governments (DRCOG)
Sidewalks 2014 - Line
vector digital data
These data were collected from aerial imagery flown spring 2014. Stereo compilation for planinmetric Sidewalk Line data occured between 7/8/2015 through 11/3/2015.
This metadata describes the stereocompiled paved sidewalks and paved trails centerlines feature of DRCOG Denver Region Urbanized Project Area. The feature was compiled from the Denver Regional Aerial Photography Project (DRAPP) 2014 Aerial Imagery Acquisition and Production. 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 the Leica ADS40 and ADS80 digital sensors and processed with Leica XPro software. 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.
Delineate paved sidewalks and paved trails with width > 5ft as centerlines. Sidewalks are paved walks for pedestrians, "Point A to Point B" use. Trails in this layer are public paved walkways intended for recreational purposes.
Capture criteria: If the sidewalk widens and the centerline shifts, create a "jig" to keep the centerline connected. The sidewalk does not stop at intersections or at parking aprons or at driveways, BUT these areas should be separate segments within the line feature and attributed differently (see attribution:Type). The main goal of this feature dataset is connectivity; it will be used for routing and modeling of pedestrian trips. When connecting "sidewalk"segments with an "other crossing" segment (see attribution: Type), only connect with there is visible access between the two sidewalk segments. Access means that a wheelchair can traverse it (so stairs do not constitute a connection). For sidewalk centerlines meeting parking apron, the portion of sidewalk centerline within the apron always breaks into a different line segment, and has a type of "other crossing" unless the sidewalk crossing the parking lot is readily visually apparent, in which case the sidewalk centerline simply continues unbroken. For sidewalk centerlines meeting driveway apron, the sidewalk continues as with the polygon sidewalks. This layer includes all public sidewalks (e.g. adjacent to a public building, schools, or roads, adjacent to commercial buildings, maintained by a public entity) and trails (e.g. in public parks, maintained by a public entity). The sidewalks layers will not include private sidewalks (i.e. serving individual residences, contained within campuses, mails or commercial complexes) EXCEPT where the sidewalk maintains connectivity with the public sidewalk network. In these instances, if the private sidewalk is too complex (i.e. multiple, indirect paths, or with many branches), a best-fit line may be drawn to maintain connectivity with the public sidewalks. Break all sidewalk and trail centerlines at line intersections.
ISO 19115 Topic Categories
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.
This project was funded, in part, by the FHWA and/or FTA, DRCOG, RTD, Denver Water, Arvada, Aurora, Bennett, Centennial, Commerce City, Denver, Englewood, Frederick, Glendale, Golden, Greenwood Village, Lafayette, Lone Tree, Lakewood, Louisville, Thornton, Wheat Ridge, and Northglenn.
Available to the public and accessible through Denver’s Open Data Catalog, http://data.denvergov.org/
Microsoft Windows Server 2008 R2 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.5.4400
D WGS 1984
Centerline of paved sidewalks and paved trails.
Internal feature number.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
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.
See illustrations for crosswalk and best fit line features in document AppendixB_Feature Requirements_20151002.xlsx.
Date attribute is created.
Month, day and year the feature entity is created
Kucera International, Inc.
Kucera International, Inc.
Name of vendor creating the entity feature
The type of paved sidewalk or paved trail.The type of paved sidewalk or paved trail.
"Sidewalk", Crosswalk", Other crossing", Best fit line".
Type of path. A "sidewalk" is a paved path for pedestrians on the side of the road. A" crosswalk" is a marked part of the paved road where pedestrians have right of way to cross. An "other crossing" is a line segment that maintains connectivity within this layer but is not a sidewalk or crosswalk. The "other crossing" should be used to connect sidewalk and crosswalk features that are separated by an average city block or less (~650ft); this feature does not have to be paved; it will only be collected if there is visible and reasonable access (wheelchair accessible) or connection between the sidewalks/crosswalks to be connected.
Length of feature in internal units.
Positive real numbers that are automatically generated.
City and County of Denver, Technology Services / Enterprise Data Management
201 W Colfax Ave, Dept 301
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See access and use constraints information.
FGDC Content Standard for Digital Geospatial Metadata