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. This field was used in a particular way in this feature class, please see SideOfRoad under Key Attributes for additional details.

• 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.

• SideOfRoad This feature class uses the SideOfRoad field in a particular way. The leftmost stripe section, or sections in the case of paired stripes, is designated L=Left, and the rightmost stripe (or stripes) is designated R=Right. Leftmost and rightmost were based on the travel direction of the nearest lane. Any stripes between the leftmost and rightmost were designated as C=Center stripes.

• StripeWidth_in The width of the stripe section, in inches, rounded to the nearest whole inch. These widths are typically 4”, 6”, 8”, or 12”.

• StripeColor The paint color of the stripe section, including the StripeColor domain: White (1) or Yellow (2).

• StripePattern The striping pattern of the stripe section, including the StripePattern domain: Solid (1), Dashed (2), Dotted (3), or Lane Drop (4).

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.