| |
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| A |
Aerial Photograph
A perspective projection of the land surface. |
|
| B |
| C |
Charts
Maps especially designed to serve the needs of navigators, nautical or aeronautical. |
|
| D |
Digital mapping system
a system for compiling spatial data directly in digital form. |
| E |
Enhancement, image
the process of altering the appearance of an image for the purpose of extraction of additional information. It may be accomplished by digital or photographic (optical) methods. |
|
| F |
| G |
General Reference Map
Map that has an objective to show the locations of a variety of different features such as roads, rivers, coastlines, etc.. |
GIS Geographic Information System
a data base technology, linking any aspect of land-related information to its precise geographic location. |
GPS Global Positioning System
is a satellite based navigation system developed by the United States Department of Defense and widely used for civilian navigation and positioning. |
|
| H |
| I |
| J |
| K |
| L |
LANDSAT
earth resources satellites operated by NOAA, United States. LANDSAT 5 was launched 01MAR94. and operates in a near polar sun synchronous orbit at an altitude of 705km. Repeat cycle is 16 days. |
LIS Land Information System
sort of synonomous with GIS. |
Lithography
The process of imprinting patterns on semiconductor materials to be used as integrated circuits . |
|
| M |
Map
a representation of the earth's surface. A cadastral map is one showing the land subdivided into units of ownership; a topographic map is one showing the physical and superficial features as they appear on the ground. |
Map Scale
The ratio or proportion between measurements on the map to those on the earth. |
Mosaic
joining of two or more adjourning photographs |
| N |
| O |
Orthophoto
A planimetrically correct aerial photograph. |
Orthophotomaps
airphoto maps, true to scale. |
|
| P |
Photogrammetry
the science and art of obtaining measurements from photographs. |
| Q |
| R |
Raster Data
a data cell (or pixel) composed of rows and columns. Satellite data is an example of raster data.
|
Remote Sensing
The process of collection, storing and extracting environmental information from images of the ground acquired by devices not in direct physical contact with he features being studied. |
|
| S |
SPOT Satellite Pour L'Observation de la Terre
the SPOT series of earth observation satellites are operated by CNES, France. SPOT 1 was launched 22FEB86, SPOT 2 was launched 21JAN90 and is currently operational and SPOT 3 was launched 26SEP93 and is currently fully operational. SPOT satellites are operated in a sun synchronous near polar orbit. Satellite altitude is 830km and the repeat cycle is 26 days. SPOT 4 was launched in December 1997. |
| T |
Thematic map
also called the special purpose map. This type of map concentrates on the distribution of a single attribute or the relationship among several. |
Topographic Map
A large scale general reference map of land areas. |
Topography
description or representation on a map of the physical and cultural surface features. |
|
| U |
| V |
Vector data
spatial data in which the location of features is defined by points and straight lines (vectors). A road network would be described by vector data. |
| W |
| X |
| Y |
| Z |
| |
Return to alphabetic index |
|
