Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>Sidewalk polygons delineated from 2022 aerial imagery. CAPTURE CRITERIA: Sidewalk polygons are compiled in 2D. This feature includes paved sidewalks and paved trails with width greater than 3 feet. Sidewalks are defined as paved paths for pedestrians, "Point A to Point B" use. Trails are defined as paved walkways intended for recreational purposes. This layer includes all public sidewalks (e.g. adjacent to public buildings, schools, roads, and commercial buildings, or maintained by a public entity) and public trails (e.g. in public parks, maintained by a public entity). This feature does not include private sidewalks (i.e. serving individual residences, contained within campuses, mails, or commercial complexes). Polygon sidewalks include areas like tree plantings and only exclude the pervious sections if they are each over 50 square feet (this threshold is also used in the parking dataset). Polygon sidewalks and trails do not cross road intersections. For sidewalk polygons meeting driveway aprons, the sidewalk supersedes. For sidewalk polygons meeting parking aprons, the parking feature supersedes. Connectivity is not maintained in this feature as it is in the centerline sidewalk dataset. CHANGE FEATURES: This dataset is an update to previously collected data. Features were originally delineated from 2014 aerial imagery, updated in 2016, 2018, 2020, and then again in 2022 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, and 2022 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 2022. SOURCE DATA: This feature was compiled from DRCOG 2022 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. Horizontal and vertical datums are NAD83(11) and NAVD88(GEOID12A), respectively.</SPAN></P><P><SPAN>Data were processed to a one mile extent of Jefferson County, Colorado by the Jefferson County Business Innovation and Technology GIS division.</SPAN></P><P><SPAN>Data are in State Plane Grid Coordinates, Colorado Central Zone, NAD83 (US feet).</SPAN></P></DIV></DIV>
Service Item Id: bae0cf627b494cf3bb2c0aa491c455da
Copyright Text: Denver Regional Council of Governments (DRCOG); Jefferson County Business Innovation and Technology GIS