Core Attributes These attributes are common across all feature classes extracted as part of the SWAAI project where applicable.

• UniqueID Unique ID for this feature type, assigned by Cyclomedia staff.

• RouteID Route ID based on ITD’s Esri Roads & Highways linear referencing system (LRS). A copy of ITD’s LRS network was provided to Cyclomedia.

• RouteDirectionCode Travel direction of nearest highway lane to feature, ascending (A) or descending (D).

• Measure or FromMeasure/ToMeasure LRS measure (in the case of discrete point features) or from/to LRS measures (in the case of line or polygon features) based on ITD’s Esri Roads & Highways LRS.

• SideOfRoad Side of road location of feature, generally L (left) or R (right). Values for B (both), C (center), and N (neither) were also included as text domain values for use where applicable.

• X/Y/Z or From_X/To_X/From_Y/To_Y/From_Z/To_Z Longitude (X), Latitude (Y), and Elevation (Z) values were included for each extracted feature (X/Y/Z for discrete points, to/from X/Y/Z for lines and polygons) Rather than the metric northing/easting present in the Idaho Transverse Mercator (IDTM, WKID: 8826) projection, the projection used for all SWAAI datasets, X and Y are decimal-degree latitude/longitude. The elevation field, Z, is in U.S. feet.

• StreetSmartLink URL link to the feature’s location in Cyclomedia’s browser-based Street Smart photo and LiDAR depth surface viewer. Following the link brings the user directly to the closest Street Smart collection location and angles the view to look directly at the feature in the 360° photograph.

• Comments General comments field.

• CollectedDate Date the feature was observed and field-collected by Cyclomedia during the vehicle-based data collection process.

Key Attributes These attributes are unique to this feature class, or are Core Attributes used differently than other feature classes extracted as part of the SWAAI project.

• MessageType General pavement message type, including the MessageType domain with the following coded values:

  • Arrow (1) Pavement message is an arrow. This category includes left turn, right turn, and thru (through) arrows. Traffic lane merge arrows are a separate category.

  • Bike (2) Pavement message is a bike, indicating a bike lane.

  • Crosswalk (3) Pavement message is a crosswalk, crossing the highway route.

  • Crosswalk (Side Street) (4) Pavement message is a crosswalk, crossing a side street.

  • Hatch Lines (5) Pavement message consists of hatch lines.

  • High Visibility Crosswalk (Side Street) (6) Pavement message is a high-visibility crosswalk, crossing a side street.

  • HOV (7) Pavement message indicates a high-occupancy vehicle (HOV) lane.

  • Look (8) Pavement message is a text “LOOK.”

  • Merge Arrow (9) Pavement message is a traffic lane merge arrow.

  • Railroad Crossing (10) Pavement message is a railroad crossing indicator, typically “R X R.”

  • Route Shield (11) Pavement message is a highway route shield.

  • School Crosswalk (12) Pavement message is a school crosswalk, crossing the highway route.

  • School Crosswalk (Side Street) (13) Pavement message is a school crosswalk, crossing a side street.

  • Stop Bar (14) Pavement message is a stop bar on a highway route.

  • Stop Bar (Side Street) (15) Pavement message is a stop bar on a side street.

  • Text (16) Pavement message is text, such as “STOP” or “SCHOOL.”

  • Yield (17) Pavement message is a yield marking, resembling a line of “tiger teeth” triangles.

  • High Visibility Crosswalk (18) Pavement message is a high-visibility crosswalk, crossing the highway route. Please note this value was initially inadvertently left out of the domain list, and added later in the project. As a result, some high-visibility crosswalks crossing highway were simply designated as Crosswalks.

  • Other (Symbols Only) (99) Pavement message is a symbol type not otherwise listed in the MessageType attribute domain.

• Length_ft The length of the pavement message feature, measured across the message perpendicular to the route or side street it is located on, in U.S. feet, rounded to the nearest tenth-foot.

Spatial Reference All data extracted as part of the SWAAI project is projected to Idaho Transverse Mercator (WKID: 8826), using the NAD 1983 (WKID: 4269) geographic coordinate system. NAVD88 (WKID: 6360) was the vertical coordinate system used for all elevation measurements.