This map This map shows current shows current real estate real estate listings aslistings as red red stars on a stars on a background background colored by the colored by the percentage of percentage of the population the population that is under that is under 18 - 18 - yellowyellow denotes a low denotes a low percentage, percentage, andand orangeorange denotes a denotes a higher higher percentagepercentage. .

Thematic Mapping Over the InternetThematic Mapping Over the Internet

Often users want to Often users want to constrain their selection constrain their selection to listings that fit to listings that fit geographic constraints, geographic constraints, such as distance from a such as distance from a place of employment, or place of employment, or proximity to a school. proximity to a school. This image shows all This image shows all listings of “…listings of “…houses houses within 3/4 of a mile of a within 3/4 of a mile of a specific hospitalspecific hospital" (" (blueblue circle). The details of the circle). The details of the first property in the first property in the constrained shown, but constrained shown, but users can view the details users can view the details of any house in the list of any house in the list simply by clicking on simply by clicking on link in the MLS# column link in the MLS# column of the table.of the table.

Spatial Geo-Query over the InternetSpatial Geo-Query over the Internet

This image illustrates This image illustrates how multiple criteria can how multiple criteria can be used to select listings. be used to select listings. In the example a geo-In the example a geo-search is made to locate search is made to locate ”…houses that are ”…houses that are within 3/4 of a mile of a within 3/4 of a mile of a specific hospital specific hospital AND AND also within 1 mile of a also within 1 mile of a specific parkspecific park." Only the ." Only the properties that satisfy properties that satisfy both criteria (shown as both criteria (shown as thethe intersection of theintersection of the blue circlesblue circles) are selected ) are selected and described in the and described in the results section at the results section at the bottom of the query bottom of the query window.window.

Extending Spatial Geo-QueryExtending Spatial Geo-Query

Extending the Thematic MapExtending the Thematic Map

This map shows This map shows the selected the selected houses (houses (greengreen stars) on top of a stars) on top of a Spot image. Spot image. Real world Real world features provide features provide insight into local insight into local conditions... conditions...

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data, data, data, data, data data Innovative GIS at Innovative GIS at www.innovativegis.comwww.innovativegis.com, select Services, select Services