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Saturday, March 12, 2011

Vector Analysis 1 process summary


1.    Opened lab7.mxd (Not the VectorAnalysis_1.mxd listed in the lab file, because this was the only file available for this lab on R: drive.)
2.    Using the Select by Location tool under the Selection menu, selected Pensacola land parcels within 2000 feet of a school, which are also within 1 mile of a hospital, not within 1 kilometer of a railroad, and are within 3000 feet of a cell tower.  This required changing the selection methods from “select features from” to “select features from selected features” to “remove from currently selected features” (for railroads) and back to “select features from selected features”.  The spatial selection method was “Target layer(s) features are within a distance of the Source layer feature.”
3.    Still using the Select by Location tool, selected features within Enterprise Zones from the features previously selected.  The spatial selection method was “Target layer(s) are within source layer features.”
4.    Changed the target layer in Search by Location to Superact_risk_features, and changed the source to selected features within the Pensacola parcels layer. There are 100 features selected in ArcMap after this step, NOT ONE.   It’s really frustrating to repeat queries four times because it isn’t clear there will be features selected on the Pensacola parcels layer AND on the risk features layer.
5.    Using the Select by Location tool, selected all parcels intersecting the flood_Zones polygon layer.  Then, using the Select by Attributes tool, selected only residential parcels within the flood zones.  Using the attribute table, and right clicking on the Market_value column heading, and choosing statistics, found the total market value of these parcels.
6.    Displayed layers under the Water group in the table of contents.  Right clicked on superact_risk_features and clicked on Join under Join and Relates menu. Joined Drainage points layer to this layer, giving all the points the value of the attributes of the polygon they fall inside of.  A new layer is created.
7.    Opened the attribute table for the new layer.  Right clicked on the heading Basin and selected Summarize.  Clicked ok on this new window.
8.    Output table was added to table to contents.  Opened this table to see list of basins with associated number of risk points for contamination.
9.    Repeated Join process for Superact_wells_esc and Superact_risk_features layers.  Looked at the output table for answer to Q6.

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