CommunityViewer GIS > Drill Down: State to Block

Overview of how you can use Proximity resources to visually analyze geodemographics from a macro to micro scale.

A GIS project can be focused on any set of geographic scope and/or set of geographic objects. A similar structure could be developed for another state(s), county region, and further drill-down.

The Interstate highways appear above the county by block map because 1) both layers/themes are checked on and 2) the highway layer is placed above the block layer in the legend. Layer order can be rearranged.

We are interested in the GIS tools to provide visual patterns such as the one presented above. But the GIS enables much more than thematic maps and pattern analysis. The following views are zoom-in views of the area near the pointer in the above map (tract 555000 in Harris County, TX).

Tract 555000 (green boundary) and mini profile

Census block groups with blue boundaries

Census blocks with red boundaries

View similar to above with Roads layer on; note roads are typically block boundaries.

Identify tool used to profile a street segment.

This area is shown below in a Google maps graphics capture. Roth El school is shown by the hand.

Clicking on the K-12 Schools layer, the CV project shows a similar view but with statistical areas.

Using the Site Analysis tool, reviewed in detail later, the total population is determined for 2 adjacent blocks.

The total population is shown in upper right (308) and the block geocodes are listed in the lower right panel.

Additional areas can be added and values recomputed.

The type of drill down illustrated here can be applied anywhere in Harris County (77,000 census blocks).

Similar macro to micro could be applied at the global/national level.

Page url: http://proximityone.com/sddmi/guide/index.htm?drill_down.htm