I set out to create a map that showed urban sprawl in the central valley of California.
Geoserver, OpenLayers and PostGIS are the technologies in this demo.
(the linux server itself is being relocated)
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Introductory Overview An overview of the central valley from a natural perspective, overlaid with two prominent marks of human development, highways and paved area. |
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| Most all of the detailed information is organized by county – as the user zooms in, show the county names and boundaries in order to facilitate choosing an area of interest quickly. |  |
| The low resolution base relief is soon to be discarded, while the names from US Census 2010 county subdivisions now appear. |  |
| Two methods of quantitatively determining where urban boundaries lie are visible, with a base layer of greenfield classification. |  |
| At the next zoom level, OpenStreetMap place names add minimal point-of-interest context, the county subdivision names are gone, while the emphasis stays on area classification. |  |
| Various classification layers are available – shown here is a California Farmland Monitoring layer. |  |
| California NAIP 2010 imagery of farmland outside Yuba City, the bright pink major highways layer, and a reasonably accurate water layer shown. |  |
| Classification layers can be combined with a base layer, for example imagery. |  |