Sunday, September 14, 2014

GIS4930 Network Analyst - Prepare Week

The focus of this module was preparation of data to be used for the production of a map and public information brochure by the City of Tampa in preparation for a hurricane. The City is especially interested in routing for evacuation, emergency access, and post-hurricane supplies, taking into consideration road closures. Elevation zones for the basemap were produced from a Digital Elevation Model which was classified into distinct elevation classes and symbolized. The flood zone for this hurricane (expected surge of 5.5 feet) is symbolized in red to stand out. Higher elevations are shown in other colors with 1-foot increments. Shelters, hospitals, fire and police stations, the National Guard armory, and roads are shown on the basemap as well. Symbols for facilities were shaped distinctly different from each other and generally included an associated letter designation to ensure that there was no confusion caused by color blindness or lack of familiarity. This would be important to anyone already experiencing the duress of an evacuation before an impending disaster.

Tampa Hurricane Planning Basemap
The streets layer was prepared for use as a network dataset with the addition of attribute fields for length in miles, travel time in seconds, and whether the road is in the flood zone. Interstates received the "not flooded" attribute because they are elevated. This information will be utilized in the next module.

A map package was created for the map and zipped together into one folder with the metadata files, basemap image, and the process summary. A sample email detailing this information was created as if a co-worker would be completing the project. The email included the zipped folder, details of what the City of Tampa had requested, what had been accomplished to date, and what needed to be completed yet.


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