geodatabase (.gdb) (ArcGIS only) OSM GeoRSS,

Metadata

Vector Data

Well Known Text

WKT (Well Known Text) Representation (of Simple Features 1.2 geometries):

  1. Point: POINT(- 117.25 35.0)
  2. Line String: LINESTRING(0 10, 20 15, 30 15)
  3. Polygon: POLYGON((0 0,10 10,10 0,0 0),(3 1,4 1,4 2,3 1))
  4. Polyhedral Surface: POLYHEDRALSURFACE(((0 10,0 0,10 0,10 10,0 10)),((0 10,5 15, 10 10,0 10)))
    1. TIN (Triangulated Irregular Netowrk)
  5. Geometry Collection:
    1. Multi Point: MULTIPOINT((0 0),(10 10),(10 0))
    2. Multi Line String: MULTILINESTRING((0 0,10 10,10 0),(3 1,4 1,4 2,5 1))
    3. Multi Polygon: MULTIPOLYGON(((0 0,10 10,10 0,0 0),(3 1,4 1,4 2, 3 1)),((20 20, 30 30, 30 20, 20 20)))

Rater Data

  1. compressed .jpg, .gif
  2. non-compressed .png, .tiff

Tagged Image File Format (TIFF) Developed by Aldus, now Adobe Systems.

GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF file.

Point Cloud Data

Spatial indexing

Algorithms: quadtree, R-tree

🏷 Category=Geographic Information System