Latest Contributions by ToreBorvik

I've scanned old airphotos for an area in peru. I scanned them using 900 dpi with TIFF format, and the digital result was very good. It took about 10-15 minutes to scan each photo. unfortunately its a while ago, so I don't remember the rest of the scanning parameters I used. My photos was a time series with 10 year interval from 1949 to 2009. I had some issues comparing the rasters after georeferencing since the resolution of the old photos were worse than the newer ones (and also physical changes in the terrain, such as changed stream of a meandering river) ... View more

do you have access to envi / envi ex? you can open the header file directly there to get the information you need.. ... View more

My results add even though they are not set as managed. They still have to be both parameter and "add to display" though ... View more

have you geocoded the points? Adresses with inaccurate quality might risk being placed in the centerpoint of a region (for instance a county, if county name is the only match of the address). In this occation, several villages might be placed at the same location. ... View more

Can multi output be used in modelbuilder? I thought it couldn't. ... View more

Thanks! I'll check it out on monday ... View more

thanks a lot! ... View more

try this: open spatial analyst toolbar, go to options, then to extent. Specify the extent to be the same as the shapefile ... View more

Not easy at least. I've not succeeded in making arcmap zoom around in a document from a script. But I'm no script pro.. ... View more

One of several approaches: Split the probably 3-band raster into individual bands. Identify the range of pixel values that is typical for swimming pools in each band of the raster. then in raster calculator, make a new 1-band raster that includes the pixel range for each of the input bands (calculation could look like [layer1] > 85 & [layer2] < 205 etc)  Now if you are lucky you have the pools in this raster but probably also some small areas that are not pools. clean up the raster with appropriate tools to get rid of these. At last, convert raster to polygon. if you have ENVI it is much easier to do it. ... View more

nope. You do not need to have arcgis open, you can call geoprocessing from within the script. ... View more

ahhh. Never mind this whole post. I thought initially that the path distance should be combined with the cost distance. but after trying I see that it can replace the cost distance so that the path distance raster can be input for cost path. But right now I have two path distance calculations in my model since to my understanding I needed it to calculate both one for FROM A TO B and another one for FROM B TO A. attached a screen of the model output, seems to work great and I also manually checked it with an aspect and slope raster, does its job 🙂 Blue Line = A to B with certain high cut/low cut angles. Green Line = B to A with different angles I could set the angles to be the same and still get different results, but I realized that now I can also model slope restrictions if a forestry truck is either loaded with timber (usually from a to b) or not (b to a). an extra bonus, hooray! ... View more

did you make the hillshade from a floating point raster or integer? using floating point rasters as source usually produce a little more aesthetic hillshade. I've also experienced a few times that I more often end up "seeing" the contour lines if I use the spatial analysis toolbar instead of using the hillshade tool in the toolbox. I can't explain why though, but you could try it ... View more