Sample Maps
Choose a thumbnail map below to see more detail
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Cartogram
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Digital Elevation Model
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Interpolation
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Landscape
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Triangulated Irregular Network
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Built-up Urban Landscape
Cartogram
Cartograms are maps where the geographic unit being looked at has its size and shape altered to reflect the magnitude of the variable being looked at. Algorithms which create cartograms are designed to maintain the approximate scale and positions of the original geographic units as best as possible given the necessary distortions.
Digital Elevation Model (DEM) and Derived Products of Slope and Hillshading
Digital Elevation Models are single band images where pixel values represent elevation. They are very useful in GIS analysis in multiple ways, not the least of which is what data can be derived from them. Two examples are Slope and Hillshading. Slope of the terrain is a key component of hydrologic and soil erosion modeling. Hillshading can be used to modify maps aesthetically, but is also an important variable in solar radiance analyses.
Interpolation
Interpolation involves calculating a continuous surface of values from the values of a set of points. There are several techniques that use differing types of statistical weighting, curve fitting and trend analysis. Each has limitations and assumptions about the input data points and care should be taken when using the results.
Landscape
Terrain models and imagery can be combined to create 3D views of the landscape.
Triangulated Irregular Network (TIN)
A triangulated irregular network takes point data and builds a 2.5 dimension surface by using the points as vertices of triangles and the attribute being displayed as height.
Built-up Urban Landscape
Combining multiple GIS elements and using 3D extrusion tools can give one a good sense of urban modification of the landscape.
Contact GIS Services
For more information, please contact at 480.965.9709