
Network Analysis
Poster layout
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Cursory exercise in using Powerpoint for a final product, since ArcMap tends to be disagreeable when working with multiple images.
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Initial attempts at a grid-like presentation were foresaken due to awkward geographic boundaries. Cropping and zooming for legibility was also difficult to deal with, so for this type of analysis a web presentation seems preferable so people would be able to see each image one at a time and magnify for individual details. (See below.)
Network analysis
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This is a series of extension tools available within ArcMap to utilize data that involves a series of lines (e.g. roads, paths, pipes, other utilities).
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Service-area analyses create polygons indicating which areas can be served within a given time parameter by a certain point. This is somewhat similar to a buffer except those are "as the crow flies" distances, and may not account for actual accessibility.
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Route analyses are similar, but try to narrow down to a single optimum route based on given factors. (For example, there may be a direct path available with a slow speed limit, so it may be preferable to go a more circuitous route that leads to a shorter total drive time.)
![]() Locator mapThis was used as a visual legend of sorts, to help indicate geography and identify each of the points without the building shapes overwhelming the data. These maps are on transparent backgrounds to make it easier to crop on demand. | ![]() Fire station driving timesBlue: < 1 min Yellow: <5 min Red: <10 min These times were chosen to match emergency responses. | ![]() WIC retailer walking timesBlue: < 1 min Yellow: < 5 min Red: < 10 min |
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![]() WIC retailer route analysisThe order of stops is automatically generated based on minimizing drive-times and but can still set specific start/end points. | ![]() Residential Treatment Walk timesBlue: < 5 min Yellow: < 10 min Red: < 15 min | ![]() Residential Treatment Centers zoomedA zoomed-in view from a preliminary version (hence swapped colors). This shows that two sites by each other combine relevant polygons (even if it might take ten minutes to walk from their site to a center,they could get to the other in five which takes precedence). The leftmost center also shows how important roads are to actual accessibility versus using a radial buffer. |





