1. Digitizing the San Marcos Cemetery
Final Report
Johnathan Phillips
Colton Love
Daniel Tittle

2. Background
The San Marcos Cemetery commonly referred to as the city cemetery, consists of a 45-acre plot located on 1001 Ranch Road 12. Founded in 1876 as an expansion of the town’s original cemetery, The San Marcos City Cemetery has burials dating back to making this cemetery a historic site for the people of San Marcos
City of San Marcos needed a spatial inventory of the San Marcos cemetery
Utilize GPS and GIS

3. Tasks Collect GPS data for required portion of the San Marcos Cemetery
Explore spatial resolution of available GPS devices
Model the layout of the San Marcos Cemetery
Apply the Pontem software methodology and file geodatabase architecture to collected data.

4. Summary of Task 1 Collect GPS data in the Ramsay Addition
Complete
“Learning period” decreased time available to collect
Collected all of section A3
Weather conditions took time away from collecting
Obstructions in A3
Ramsay Addition Boundary
GPS the BEC-LIN control points

5. Summary of Task 2 Explore spatial resolution of available GPS devices
Complete!
Three units available
Chose the Trimble GeoXT 2005 edition
About 50cm of accuracy and about 7 satellites while in the field

6. Summary of Task 3 Model the layout of the San Marcos Cemetery
Complete – section A3
GPS collected Section, Addition, Grave Block boundaries and Tree locations
Hand created Grave polygons

7. BEC-LIN vs Super GPS Bros

10. Summary on Task 4 Apply Pontem software attribution requirements and File Geodatabase architecture
Complete
All data has been transferred into a file geodatabase
Shapefiles are consistent with BEC-LINs schema

11. Changes to the Project Scope: Proposal vs Progress Report vs Reality
Methodology: Initial vs Grid vs Final

12. Method 1
~45mins

13. Method 2
~4hours

14. Method 3
~15mins

15. Final Methodology Collect data in aggregable weather
For trees: use the distance-bearing method for collection
Draw grave polygons b/c GPS device was not accurate at that size of polygon
Collect in the GPS native WGS84
For grave blocks under tree cover or otherwise inaccessible: physically measure the center of the block and use the distance-bearing method to collect the center
For grave blocks: collect a few really accurate and precise polygons
Post process GPS data on the day of collection
Reproject data into Texas South Central in ArcMap
Collect one point per vertex in polygons

16. Conclusion We completed what we could, of the initial FRP.
The methodology we developed can be easily implemented for other projects with minor tweaks
Determined actual needs of GPS collected data

17. Lesson Learned

18. Lesson Learned

19. Questions?