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Digitizing - A data conversion process by
which an individual traces a paper map or a raster image (heads up
digitizing) into a GIS package. Digitizing a map produces vector
data as the end result. |
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Dot Density Map - A thematic
map that carries information by showing a large number of tiny dots,
wherein each dot represents some specific unit quantity. Example:
Population Map |
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GIS - (Geographic Information Systems)
Collection of computer hardware and software designed to efficiently
create, manipulate, analyze, and display all types of geographiclly or
spatially referenced data. A GIS allows complex spatial operations
that are very difficult to do otherwise. |
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GMS - (GIS Mapping Solutions) Independent
GIS consulting company |
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Geo Coding - A process of assigning X and
Y coordinates to records from address information. |
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Graduated Symbol Map - A
thematic map that shows symbols in a variety of sizes to indicate which
objects have higher or lower numerical values |
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Layer - Basic building block
of every GIS. GIS projects usually consist of several superimposed
layers. Layers are also know as themes. Examples of a theme or
a layer could be: streets, utility lines, parcels, zip code boundaries,
etc.) GIS layers are made up of Points, Lines or Polygons. |
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Pin Map, Push-Pin Map - A
type of map named after the practice of inserting push-pins into a wall
map. Pin map features are point objects. Geocoding and GPS are ways to
create point objects. Example: Customer Map |
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Query - The selection of information from
a database (SQL Statement) |
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Spatial Analysis
- An operation that examines spatial data with the intent of extracting
new data from some required condition. Many GIS packages provide
tools to facilitate these conditions such as buffer generation, polygon
overlay, intersect, contains, or within adjacent. |
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Thematic Map - A
type of map that uses a variety graphic styles to graphically display
information about the map's underlying data. |
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