Using Site Analysis Tools

.. tools that you can use for visually-based demographic-economic analysis and decision-making …
• how many of your existing/prospect client locations are in a custom defined geographic area — like 10 miles from a store location?
• how many students are enrolled in free/reduced fee lunch programs in a selection of schools in a neighborhood/area?  
• What is the population of a certain age in a set of custom selected block groups in a study area?
• What is the size of the Asian population in a group of selected counties?

These are questions that are easily answered using GIS site analysis tools that can be challenging when using tabular data files and spreadsheets. Often the selection of the geographies (schools, block groups, counties) is more easily performed with visual GIS tools rather than codes in a list. See corresponding Web page.

Visually Selecting Counties to Examine Demographic Trends

Mouse used to select areas; demographic profile at right of map.
Above application reviewed below; emulate for your areas of interest.

This section provides an overview of using the CV XE GIS Site Analysis operations with the Hawaii 2014 GIS project (see main section). The Site Analysis operations enable you to visually select multiple geographic objects (points, lines, area) that comprise a study area (e.g., a selection of 5 census tracts, a selection of 10 schools, etc.). Use the Site Analysis operations to:
• select more or different objects,
• output data records associated with selected objects,
• aggregate demographic-economic characteristics for those selected objects,
• output/save the aggregated data for the collection of selected objects.

These operations are not specific to the Hawaii 2014 GIS project (independent of any specific GIS project) but are illustrated here in context of that project.

To use this CV XE GIS feature, you must code your User Group ID (no fee, join now) in the “Key” edit box shown in the Settings>Start-Up form. This is a one-time change that enables operation of this feature.

Starting Site Analysis
With CV XE GIS running, click Analytics>SiteAnalyst. The Hawaii2014 GIS project opens. The no fee version of Site Analysis operates only with the Hawaii2014 GIS project.

Schools Application
The following steps illustrate use of Site Analysis with the public schools layer.
• click the name of the K12 public schools layer in the legend panel at left of map.
… it turns blue and is the “active” layer.
• the Site Analysis panels appear at right of map. Dbl-click “SCHID’.
• scroll down in the upper right section and select FRELCH, REDLCH, TOTFRL (illustrated in graphic below).
• in the map window, click on location shown at pointer and drag mouse to one mile radius and release.
• schools intersecting with the circle are selected; their summary characteristics are shown in the lower right grid.
• there are 8 cross-hatched (in map) schools selected, the total free and reduced lunch enrollment is 2,094 students.
• more details about the operations are covered in Web sessions.


Click graphic for larger view.

Census Tracts Application
The following steps illustrate use of Site Analysis with a census tracts layer.
• click the name of the Tracts %HS Graduate layer in the legend panel at left of map.
… it turns blue and is the “active” layer.
• the Site Analysis panels appear at right of map. Dbl-click “GEOID’.
• scroll down in the upper right section and select D028 (total population) and D039 (Asian population).
… illustrated in graphic below.
item names and descriptions shown here.
• in the map window, click on location shown at pointer and drag mouse to intersect with two tracts and release.
• tracts intersecting with the circle are selected; their summary characteristics are shown in the lower right grid.
• there are 2 cross-hatched (in map) tracts selected, the total Asian population is 4,523.
• more details about the operations are covered in Web sessions.


Click graphic for larger view.

County Application — in California
The following steps illustrate use of Site Analysis with a county layer.
• click the name of the Counties layer in the legend panel at left of map.
… it turns blue and is the “active” layer.
• the Site Analysis panels appear at right of map. Dbl-click “GEOID’.
• scroll down in the upper right section and select items illustrated in graphic below.
item names and descriptions shown here.
• in the map window, click on location shown at pointer and drag mouse to intersect with two counties and release.
• counties intersecting with the circle are selected; their summary characteristics are shown in the lower right grid.
• there are 2 cross-hatched (in map) counties selected, the total Census 2010 population was 12,828,837.
• more details about the operations are covered in Web sessions.


Click graphic for larger view.

Summary Data to Clipboard
When the lower right grid summary updates, the grid values are written to clipboard. The content of clipboard can optionally be pasted in spreadsheet software. An augmented view of the clipboard data for the above application is shown below.

Click graphic for larger view.

View/Export Selected Records for Selected Geographies
Click View File button to view the selected records (contained in the active shapefile dBASE file). The following view shows the selected records in the county application. Note that only the two records are selected. These records could optionally be exported/saved using the CopyTo button. This view illustrates use of the “Field Location Manager” (FLM) button in tool bar. Use of FLM does not affect structure of the dBASE file. Keying into a field value immediately and permanently modifies the record.

Click graphic for larger view.

More Information About Site Analysis
Only selected features of Site Analysis have been shown here. See more information at Site Analysis operations.

Support Using these Resources
Learn more about demographic economic data and related analytical tools. Join us in a Decision-Making Information Web session. There is no fee for these one-hour Web sessions. Each informal session is focused on a specific topic. The open structure also provides for Q&A and discussion of application issues of interest to participants.

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