Question 9 5 pts According to the ArcGIS direction codes: 1. Draw directional arrows on the "Flow Direction" raster to show the flow direction (Note: cell values represent directions defined by ArcGIS) [5 pts]; Take a picture of your calculation sheet. Make sure the image is clear enough to read. 2. Then calculate the flow accumulation for blank cells and write them into the "Flow Accumulation" raster, assuming that each cell initially gets 1 unit of water from rainfalls [10 pts]. Take a picture of your calculation sheet. Make sure the image is clear enough to read. 1 4 8 4 0 1 0 0 32 64 128 4 2 4 8 0 0 16 1 128 64 2 4 0 8 4 2 64 128 1 4 0 0 Flow Accumulation ArcGIS direction codes Flow Direction 3. Given a flow accumulation threshold as 5, please draw the stream across this surface. Use '1' to label stream cells, and '0' for other cells. (5pts) Take a picture of your calculation sheet. Make sure the image is clear enough to read. Stream network
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To draw directional arrows on the "Flow Direction" raster, you need to assign the appropriate direction code to each cell. The ArcGIS direction codes are as follows: - 1: Flow to the right - 2: Flow to the upper right - 4: Flow to the top - 8: Flow to the upper Show more…
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