Tuesday, May 11, 2010

Acid Rain - projection

The data was sent by Eric over the weekend - different data set
Opened the data into blank arcmap -
1. tool box
a. data management
b. projections and transformations
c. raster
d. project raster

Input Coordinate System - Albert's Equal Area conic for EPA (suggests that projection has been found in original data)
Output - NAD1983, UTM 19

Eric mentioned that we should use 'Nearest Neighbor' and this option was preselected.
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Created Raster - converting image over to polygon - still a lot of data to try and manage

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Exported Map into Photoshop as .TIF
Used Magic wand to select gray color
Under 'Select' option -'Modify' - 'Expand' - '2 pixels'
Deselected Anti-Aliased and Contiguous to remove gray boarder - however the smoothed option creates a different impression of acid rain in Maine than compared to the original.

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States and Provinces:
Exported out data for States and Provinces (minus Maine in the 'States' data)
Created new features along the boundaries merged two pieces together
Clipped the features to the state of Maine (make sure to select 'discard' area that intersects)
Grayed and Whitened the areas/boundaries

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