GIS Dictionary

In image processing, an image made by subtracting the pixel values of one image from those in another.

[GPS] A technique for increasing the accuracy of GPS measurements by comparing the readings to two receiversone roving and the

[diffusion] The spread of an innovation or technology use among a group of people or organizations.

[standards] Acronym for Digital Geographic Information Exchange Standard. A standard for spatial data transfer among nations, data producers, and data

[mathematics] Represented in discrete, quantified units rather than continuously. Computers process and store information in digital form.

[graphics computing] An image stored in binary form and divided into a matrix of pixels. Each pixel consists of a

[remote sensing] Any technique that changes the digital values of an image for the sake of analysis or enhanced display,

[remote sensing] In a digital image, a value assigned to a pixel.

[data capture] The process of converting the geographic features on an analog map into digital format using a digitizing tablet,

[data capture] A way of using a digitizing tablet in which locations on the tablet are mapped to specific locations

An algorithm that examines the connectivity of a network to find the shortest path between two points. Dijkstra’s algorithm is