How to Upload a Shapefile of Polygon Road Zones

This guide will show you how to make a Zone Set of polygon Zones for road segments in StreetLight InSight via uploading a shapefile. Polygon Zones for road segments are Zones that are always designated as Pass-through. They are used for turning ratios, corridor studies, select links, and so much more. Think of this type of Zone as a “gate” or digital sensor line on the roadway that analyzes the trips that pass through it.

These “gates” can be created in a GIS platform in a fashion similar to the techniques of drawing the Zones and then uploaded as described below.

Your Shapefile

There are some requirements for the shapefile to be uploaded.

1. Make sure there is at least one “gate” polygon in your shapefile.

2. Ensure that there is a column with unique values to be used for the name field.

3. If you need to use directionality, you can designate the direction in one of the fields as a degree from 0° to 360°, where 0 is true North, 90 is East, etc.

4. Be sure to make a .zip file of your shapefile with all the requisite files. You can download and follow our shapefile template to be sure that you include everything.

5. Geometries must be spatially valid with a defined map projection (SRID). We recommend 4326.

Note: If your shapefile includes a field for direction, but you do not wish to specify a direction for your zone(s), leave the value as NULL instead of 0. A direction value of 0 is read as due north by our platform.

Creating Polygon Zones by Uploading a Shapefile

Step 1:  Navigate to the “Manage Travel Projects” tab section of your StreetLight InSight account, which is located in the upper left hand corner under the menu icon.

Step 2: Navigate to the “Manage Zone Sets” tab and click the “Add Zone Set” button.

Step 3:  Create a name for your Zone Set. Keep “Polygon” as the Zone Set Type.

Step 4: Upload a shapefile by clicking the button.

Step 5: Next, browse to your zipped shapefile and click upload.

Step 6: You will see the “Choose Data” fields dialogue box appear. Be sure to check the correct attributes are chosen for each field.

  • Only columns with unique values will appear for the Zone Name. Each Zone must have a unique name.
  • Zone IDs (a number assigned to each Zone) are optional.

  • For road gates, the most important thing is that you select “Always Yes” on the “Zone is Pass Through” drop down. If you included a column with degrees to assign Direction values, you can also pick “Determine by the Direction.”

Step 7: After mapping your fields, click continue.

Step 8: If you chose to include Calibration, the next page will direct you to map the calibration fields as well. Learn more.

Step 9: Once the shapefile has uploaded, save your Zone Set.

Note: You can view and edit your Zones using the draw tool before saving too. To do so, click on the edit pencil icon next to the Zone. You can also copy Zones, or delete Zones from your Zone Set before saving. You can also edit any Zone Set that has not yet been used in a Project. 

Note: Editing a zone is disabled if the polygon contains more than 250 points. We recommend editing complex zones in GIS or redrawing them in our platform.

Troubleshooting: 

If you receive an error message when uploading a shapefile,

  1. Check that the shapefile is zipped.
  2. Check that the shapefile has a unique value to use for the Zone name.
  3. Check the structure of the shapefile.
  4. Contact Support

 

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