GIS Dictionary

[data models] Data such as elevation or temperature that varies without discrete steps. Since computers store data discretely, continuous data […]

[data models] A feature that is not spatially discrete. The transition between possible values on a continuous surface is without

[data models] A raster in which cell values vary continuously to form a surface. In a continuous raster, the phenomena

[printing] A photograph that has not been screened and so displays all the varying tones from dark to light.

The difference in elevation between adjacent contour lines.

[cartography] A line on a map that connects points of equal elevation based on a vertical datum, usually sea level.

[data capture] Assigning elevation values to contour lines.

[remote sensing] In remote sensing and photogrammetry, the ratio between the energy emitted or reflected by an object and that

[graphics computing] The ratio between the maximum and minimum brightness values in an image.

[graphics computing] Increasing the contrast in an image by expanding its grayscale range to the range of the display device.

[computing] A basic element of a software application’s GUI. Examples of controls include menus, buttons, tools, check boxes, slider bars,