Timeline for Finding elevation differences between adjacent pixels in ArcGIS Desktop?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
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| Aug 22, 2011 at 15:32 | comment | added | whuber | The slope doesn't work that way, Stephen. It's based on a least squares fit of a plane to the 3 x 3 neighborhood. Typically, it doesn't correspond to the slope between any pair of cells within the neighborhood. | |
| Aug 22, 2011 at 2:01 | comment | added | Stephen Lead | If you calculate the FLOWDIRECTION (help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//…) you'll know which cell was used to calculate the slope at that point. Based on that, you can calculate the elevation difference between the adjacent cells. Does that work? | |
| Aug 21, 2011 at 23:59 | comment | added | Kate | Thanks for the response... I have calculated slope and all the other derivative surfaces there are... Do you have a method I could use to show where exactly there is a difference of 16m+? Arc uses a 3x3 matrix to calculate the slope, with the center pixel not being used in the calculation. | |
| Aug 21, 2011 at 23:53 | history | answered | Stephen Lead | CC BY-SA 3.0 |