GIS terms starting with Q

5 terms

1. quadrangle (quad) See topographic map.
2. QUADRANT The District of Columbia is divided into four quadrants: Northwest, Northeast, Southwest and Southeast.
3. quadtree A spatial index which recursively decomposes a data set (e.g., image) into square cells of different sizes until each cell has a homogeneous value.
4. quarter quad One-quarter area of a four-sided quadrangle that depicts 7.5 minutes of latitude and 7.5 minutes of longitude on a side.
5. Query A request for identification of a set of assets, expressed in terms of a set of criteria, which the identified item must satisfy.