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CAPTURE CRITERIA: Parking polygons are compiled in 2D. This feature includes outlines of paved, impervious parking lots with an area greater than or equal to 400 square feet. The entrance into the lot is included and the feature connects to adjacent roads. Pervious features within parking lots (i.e. islands) that are greater than or equal to 50 square feet are captured. This layer does not include on-street parking or parking garages (the latter are captured by the building roofprints layer). When sidewalk polygons meet a parking apron, the sidewalk breaks and the parking polygon continues, unless the sidewalk visibly crosses the parking area. Dumpster areas in the parking lot are included. ATTRIBUTION: Unique ID, Type (Impervious, Pervious, Mixed) 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. 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CAPTURE CRITERIA: Sidewalk centerlines are compiled in 2D. This feature includes paved sidewalks, paved trails, painted crosswalks, and suggestions of network features that may be missing. Features with width greater than 3 feet are included. 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, malls, apartment complexes, mobile home parks, or commercial complexes) except where the sidewalk maintains connectivity with the public sidewalk network. If the sidewalk widens and the centerline shifts, a \"jig\" is created to keep the centerline connected. The sidewalk does not stop at intersections, at parking aprons or at driveways, but these areas are delineated as separate segments within the line feature and attributed differently (e.g. for sidewalk centerlines meeting a parking apron, the portion of the sidewalk centerline within the apron is a different line segment and is attributed as an \"other path.\u201d) If the sidewalk crossing the parking lot is visually apparent, the sidewalk centerline continues unbroken but if not, the parking apron supersedes. For sidewalk centerlines meeting a driveway apron, the sidewalk supersedes. One intended use of this dataset is routing and modeling of pedestrian trips. Covered walkways near transit-oriented development areas are included even though the actual path cannot be seen from the imagery. ATTRIBUTION: Unique ID, Type (Sidewalk, Crosswalk, Possible Missing Sidewalk, Possible Missing Crosswalk, Other Path, Best Fit Line). A \"sidewalk\" is a paved path for pedestrians; most often on the side of the road. A \u201ccrosswalk\" is a marked (painted) part of the paved road where pedestrians have right of way to cross. Crosswalks within parking lots are not included. A \u201cpossible missing sidewalk\u201d is an area on the side of a road where a sidewalk appears to be missing. An indication of a missing sidewalk would be existing sidewalks in the surrounding blocks. This feature should not be paved and should not cross the road. Segments with this attribution can be delineated up to 650 feet to maintain connectivity in the layer. A \u201cpossible missing crosswalk\u201d is a crossing of a major street that doesn\u2019t currently have crosswalk paint markings. Major streets are indicated by road surface markings. Segments with this attribution can be delineated up to the width of the street to maintain connectivity in the layer. An \u201cother path\u201d is a line segment that doesn\u2019t meet criteria for the other types but needs to be included in the data set to maintain connectivity. An example would be a sidewalk or possible missing sidewalk that breaks at a parking apron. The section that covers the parking apron would be an \u201cother path.\u201d Segments with this attribution can be delineated up to 650 feet to maintain connectivity in the layer. A \u201cbest-fit line\u201d is a straight feature drawn through a decorative sidewalk pattern (e.g. on a school campus). It indicates that a sidewalk is there but does not trace all pedestrian possibilities. Sidewalk widths are available to project partners, courtesy of Felsburg, Holt, and Ullevig. 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. 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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. 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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. 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