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Pages 70-76

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From page 70...
... 70 A P P E N D I X B This appendix addresses two questions associated with using GIS to implement the ActiveTrans Priority Tool (APT) methodology.
From page 71...
... Guidance for Utilizing GIS with the ActiveTrans Priority Tool 71 Choosing a Clear Process Any calculations performed in GIS will likely need to be communicated to people who are unfamiliar with GIS. As a result, it is probably better to opt for simpler GIS procedures that can be more easily communicated rather than more complex procedures that may be more difficult to explain and understand.
From page 72...
... 72 Pedestrian and Bicycle Transportation Along Existing Roads -- ActiveTrans Priority Tool Guidebook Setting Up the GIS Database Setting up the GIS database is something that should be accomplished in Step 7: Set Up Prioritization Tool. As previously mentioned, in order to maintain transparency in the prioritization process GIS should generally not be used for scaling variables, applying factor weights, and calculating prioritization scores.
From page 73...
... Guidance for Utilizing GIS with the ActiveTrans Priority Tool 73 reflect a mistaken understanding of what the buffer is intended to capture. The question in this case is not, "How far would the average person be willing to ride a bicycle to a park?
From page 74...
... 74 Pedestrian and Bicycle Transportation Along Existing Roads -- ActiveTrans Priority Tool Guidebook In addition to understanding what the buffer is intended to capture, it is also important to consider whether the variable layer used in the calculations is represented by points, lines, or polygons, since the type of geographic representation can affect whether particular locations are included in the buffer. For example, it makes a difference whether parks are represented as points or polygons, since although the boundaries of a park may be within the buffer distance, a point representing the location of the park may not be within the buffer.
From page 75...
... Guidance for Utilizing GIS with the ActiveTrans Priority Tool 75 If the answer to any of these questions is yes, then the reasons why should be investigated, and if necessary the operations should be re-performed. Communicating Results Maps created in GIS are an excellent way to communicate and cross-check the final prioritization calculations, including scaled variable values, unweighted factor scores, weighted factor scores, and prioritization scores.
From page 76...
... 76 Pedestrian and Bicycle Transportation Along Existing Roads -- ActiveTrans Priority Tool Guidebook Figure B-4. Phasing map.

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