Continental Divide Trail GPS Mapping Project


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Basic outline of implementation of the CDNST GPS Mapping Project

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  • Overview: Learn what to collect Learn how to use the GPS Get collected data into GIS Share data with agencies/public
  • Continental Divide Trail GPS Mapping Project

    1. 1. Standardization of the Continental Divide National Scenic Trail (CDNST) Data Management Kerry Shakarjian University of Denver Department of Geography Masters of Science Geographic Information Science Final Project
    2. 2. Overview <ul><li>~3,100 miles crossing MT, ID, WY, CO, NM </li></ul><ul><li>Multiple land management agencies: </li></ul><ul><li>BLM, NPS, US Forest Service </li></ul><ul><li>Lead agency = US Forest Service </li></ul><ul><li>(Lakewood, CO) </li></ul><ul><li>Lead partner = Continental Divide Trail Alliance (CDTA) </li></ul>Purpose <ul><li>Create standard protocol for CDNST data collection useful across multiple agencies </li></ul><ul><li>Utilize single database across multiple agencies to coordinate CDNST data after collection </li></ul>
    3. 3. Current Issues <ul><li>Varying trail management policies </li></ul><ul><ul><li>Different methods/protocols among </li></ul></ul><ul><ul><li>agencies </li></ul></ul><ul><ul><li>Need: Multi-jurisdictional </li></ul></ul><ul><ul><li>collaboration </li></ul></ul><ul><li>GIS attribute coding disagree </li></ul><ul><ul><li>Agency road definitions differ </li></ul></ul><ul><ul><li>Creates potential for different </li></ul></ul><ul><ul><li>interpretation </li></ul></ul><ul><ul><li>Need: One method of coding </li></ul></ul><ul><li>Variety of sources </li></ul><ul><ul><li>Inconsistent data collection </li></ul></ul><ul><ul><li>Need: Systematic data collection </li></ul></ul>Data Consistency!
    4. 4. Standardized Solutions <ul><li>CDNST GPS data dictionary </li></ul><ul><ul><ul><li>Consistent: </li></ul></ul></ul><ul><ul><ul><ul><li>feature attributes (CDNST center line, signs, bridges, etc.) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>shape (point/line) </li></ul></ul></ul></ul><ul><ul><ul><ul><li>data types (menu, numeric, text) </li></ul></ul></ul></ul><ul><li>CDNST data managed by CDTA </li></ul><ul><ul><ul><li>Multi-user ArcGIS geodatabase </li></ul></ul></ul><ul><ul><ul><li>Spatial Database Engine (SDE) server </li></ul></ul></ul><ul><ul><ul><li>Single editor-verify data </li></ul></ul></ul><ul><ul><ul><li>Multiple users-collect/input data </li></ul></ul></ul>
    5. 5. Project Flow Chart <ul><li>CDNST </li></ul>Bureau of Land Management National Park Service U.S. Forest Service Data Dictionary Standard Methodologies Post Processing Data Attributes Data Collection Continental Divide Trail Alliance (CDTA) Multiuser Geodatabase Public
    6. 6. Methods <ul><li>Determine best technologies for data collection & budget </li></ul><ul><li>Develop, test and modify data dictionaries for collecting CDNST data </li></ul><ul><li>Develop data dictionary feature attribute definitions table </li></ul><ul><li>Develop Structures and Signs Guide </li></ul><ul><li>Develop GPS pre-data collection setup standards and field methods </li></ul><ul><li>Database storage & multi-user access (agencies) </li></ul>
    7. 7. GPS Criteria <ul><ul><li>Data dictionary capable (standardization) </li></ul></ul><ul><ul><li>Ease of changing battery and charging of battery </li></ul></ul><ul><ul><li>Battery life is > 8hrs (field time) </li></ul></ul><ul><ul><li>Carrier phase and post-processing capable </li></ul></ul><ul><ul><li>(quality control) </li></ul></ul><ul><ul><li>$ budget </li></ul></ul>
    8. 8. Field Tools <ul><li>Magellan ProMark 3 professional GPS unit </li></ul><ul><ul><li>Fully charged, extra batteries, external antennae, current dictionary, enough memory-extra SD cards </li></ul></ul><ul><li>Digital camera </li></ul><ul><ul><li>Minimum 6 mega pixels </li></ul></ul><ul><ul><li>Fully charged, extra SD cards, extra batteries </li></ul></ul><ul><li>Field notebook w/extra pencils </li></ul><ul><li>Compass/maps </li></ul><ul><li>12’ measuring tape </li></ul>
    9. 9. Data Dictionary Feature Attributes <ul><li>Magellan Mobile Mapper Office software (free online) </li></ul>
    10. 10. Feature Attribute Definitions
    11. 11. Feature Attribute Definitions
    12. 12. Structures and Sign Guide
    13. 13. GPS Setup Pre-field <ul><li>PDOP (Position Dilution of Precision) =12 </li></ul><ul><ul><ul><li>post process filter by PDOP (keep lowest) </li></ul></ul></ul><ul><li>1 second interval </li></ul><ul><li>Set camera time to match GPS time </li></ul><ul><ul><ul><li>write in notebook (syncing photos) </li></ul></ul></ul><ul><li>15 min for GPS to gather almanac and satellites </li></ul>
    14. 14. GPS Methods in Field <ul><li>Use field guides </li></ul><ul><li>Take photos of every feature and vistas </li></ul><ul><ul><li>Signs are readable in photos! </li></ul></ul><ul><ul><li>Bridge and water (two photos) </li></ul></ul><ul><li>Notebook: photo #, photo description, vista description, viewing direction (360 0 ) </li></ul><ul><li>Slow walking during switchbacks </li></ul><ul><li>Pause line while collecting feature </li></ul><ul><li>Trail line is separate from Road line! </li></ul>
    15. 15. 2009 Collection Examples Switchback accuracy from GPS pilot project using a Magellan ProMark 3 GPS unit.
    16. 16. After Data Collection <ul><li>Transfer data to MMO from GPS </li></ul><ul><li>Post process data using CORS (Continuously Operating Reference Stations) </li></ul><ul><li>Correct major outliers and attributes mistakes or blanks </li></ul><ul><li>Export to ArcGIS shapefile format </li></ul><ul><li>Process photos to stamp lat/long </li></ul><ul><li>Add shapefile to previously created geodatabase </li></ul>
    17. 17. Photo Stamping
    18. 20. Multi-user SDE Database <ul><li>FS R2 GIS clearinghouse potential </li></ul><ul><li>Pacific Crest Trail GIS clearinghouse </li></ul><ul><li> </li></ul>
    19. 21. Summary
    20. 22. Questions?