Field GIS

Summer 2003

Preparing for field expedition

  • dowloading basemap layers

    • dems

    • digital orthoquads

    • airphotos

    • other layers: hydrology, roads, etc

  • converting basemap layers (illustration)

    • zip

    • tar

    • e00

    • SDTS

    • other formats: mr sid, jpeg, imagine, tiff (world files)

  • Representing things (example)

    • Points, Lines, Polygons, Raster, Tin, Attributes (like spreadsheets!)

  • Projections and coordinate reference systems (reference ellipsoid) (Dana's overview)

  • MetaData - Don't leave the ftp site without it!

    • sleuthing for metadata

Build your database

    • Choose fields

    • define data types

    • data validation

GPS links