Field GIS

Summer 2009

Themes, layers, or coverages

Vector format data types

Descriptive attributes

Raster vs Vector data

Raster data

Converting spherical to cartesian coordinates

Projecting

Geoids

Datums

Units

Projection or Coordinate System: composite set

Nitty Gritty: "On the fly" versus "physical" reprojection.

ArcMap trick: import

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

• Lat, Long, UTM, State Plane

• Geoid, Relationship between Geoid, Spheroid, Datum

• NAD 27/NAD83 (North American Datum)

  • badly registered example

  peters projection

Anatomy of various data formats

Shapefiles

Arc Coverages

World Files for images

File Management