Rachel Cavin, ManagerJames Dodds, Assistant Manager

Taylor Dorn, GIS AnalystKyler McNew, GIS Analyst

Project Progress ReportCartographic Modeling of

Sidewalk Location Selection for The City of San Marcos, Texas

Project Description Our purpose is to develop a GIS model

to select locations in need of pedestrian infrastructure improvements within San Marcos, Texas.

The selection process is based off on location of pedestrian traffic generators throughout San Marcos, such as schools, retail centers, and parks.

New Methodology Divide city limits into ¼ mile grid

cells. Score each grid cell by pedestrian

traffic generators and length of sidewalks contained.

Compare highest scored cells to aerial imagery.

Select areas in need of sidewalks (Subjective)

Project Progress Example

Our grid system is made up of ¼ square mile cells through San Marcos city limits.

Pedestrian traffic generators will fall within each cell, contributing to the score of the cell. Length of sidewalks in the cell will also be considered in cell scores.

Project Progress ExampleWithin the selected high scoring cells, we will analyze facilities, gaps, and our aerial photograph to make recommendations on areas in high need of pedestrian infrastructure for facility access and network connectivity.

Completed Work Literature review Data collection

• Initial data from The City of San Marcos• Layer creation (Low income housing, Bobcat Tram

and CARTS bus routes, trailheads, & pedestrian traffic generators)

• Aerial imagery Data processing

• Classification of pedestrian traffic generators Methodology change

• Use of grid system instead of inverse sidewalk layer

Work In Progress Data analysis

• We are currently planning and developing our model to locate areas of the city that are ranked highest for pedestrian traffic.

Future Work Select high scoring cells above a

threshold as sidewalk development focus areas.

Locate segments in need of sidewalks by comparing current sidewalk inventory to aerial imagery within the highest ranked cells.

Generate metadata for all data created during our project.

Create final deliverables for our client.

Time Schedule

Phase 1: Data Collection (Completed)

Phase 2: Data Processing (Completed)

Phase 3: Data Analysis (In Progress)

Phase 4: Data Interpretation (Future Work)  February 20: Proposal Presentation (Completed)March 25: Progress Presentation (In Progress)May 3: Final Product Delivered (Future Work)

FEBRUARYM T W T F S S        1 2 34 5 6 7 8 9 1011 12 13 14 15 16 1718 19 20 21 22 23 2425 26 27 28      

MARCHM T W T F S S        1 2 34 5 6 7 8 9 1011 12 13 14 15 16 1718 19 20 21 22 23 2425 26 27 28 29 30 31

APRILM T W T F S S1 2 3 4 5 6 78 9 10 11 12 13 1415 16 17 18 19 20 2122 23 24 25 26 27 2829 30          

MAYM T W T F S S    1 2 3 4 56 7 8 9 10 11 1213 14 15 16 17 18 1920 21 22 23 24 25 2627 28 29 30 31    

Problems Our main issue was finalizing our

methodology.• Decided on using a grid system

Eliminating subjectivity• Within the ranking of criteria

Accuracy of Google Earth• Points created and imported are not exactly

accurate to their true locations We have overcome all issues that

have presented themselves

Final Deliverables At the conclusion of our project, The City of San

Marcos will receive the following:• Detailed Final Report (two copies)• Project Website• CD, two copies containing:

All data Metadata Proposal, Progress Report, and Final Report Poster PowerPoint Presentations Instructions on how to use the CD (readme file)

A poster will be produced for the Texas State Geography Department.

Conclusion We are on schedule. Problems have been resolved.

• Methodology has been improved. May 3rd deadline will be met.

Any Questions?

Thank you.