Latest Contributions by RobertoFilloramo

Hi, I am using Armap 10.8.2 and my issue is the result obtained from the path distance tool. it appears a warning massage stating: Cost Cells with zero or negative values were encountered. Not all source cells may have been processed. The used data are: -shp point as origin; -DTM (used as surface raster and vertical surface input); -Slpoe (used as cost raster).   I used to process the same data in Arcmap 10 and I've never had this problem.   How can I fix it? I attached an image of the result.   Thank you in advance   ... View more

Hi, I am working with ArcGIS 10.1 and I am trying to figure out some landscape analysis on group movement in an area. I read that it is possible to generate friction surface using calories expended based on slope and stream crossing. It could be interesting for me, in order to create a cost of movement surface. Could someone give me some tips on it? Thank you in advance. ... View more

I am using ArcMap 10.1, I am getting some trouble because of the alignment between the raster (slope) and its coastline (shapefile). They seem to have the same coordinates, but there is no match. Here the shapefile data (geometry type - Line): Projected Coordinate System:    WGS_1984_UTM_Zone_33N Projection:    Transverse_Mercator False_Easting:    500000,00000000 False_Northing:    0,00000000 Central_Meridian:    15,00000000 Scale_Factor:    0,99960000 Latitude_Of_Origin:    0,00000000 Linear Unit:     Meter Geographic Coordinate System:    GCS_WGS_1984 Datum:     D_WGS_1984 Prime Meridian:     Greenwich While attached you will find the slope spatial reference and a sample of the overlapping between both. Could someone help me? thank you in advance ... View more

Hello, I am using ArcGIS 10.1 and I am trying to use the contour tool in order to get isochrones on a time cost raster. The raster has been estimated in the raster calculator by summing the path distance outcomes (the first one using as vertical values the Tobler's function "AWAY", so from the one point to the others; the second using the Tobler' function "TOWARDS", so from all the points to the source). The resulting raster has been converted from hours to minutes by multiplying for 60 in the raster calculator. Since I would know how many time it takes to reach a specific land portion or other points, I generated the contour lines at the intervals of 30 (minuntes, in this case) in order to get a visual insight about that. The problem is that the contour lines consider as reachable in the same minute range also point placed at several kilometres away from the source point. To make clear, in the attached image, the blue contour line considers as reachable in 90 minutes the cell raster placed at 40 km from the source point (blue point). How is it possible? I presume that it occurred some problem in the contour/surface raster estimation. Has someone some clue or suggestion? Thank you in advance. ... View more

Hello, I use ArcGIS 10.1 and I would like to create a suitability map using the multicriteria analysis. Let me point out that I am new of this analysis and I tried to read something about it, but it is not very clear for me... I would use data as geomorphology, pedology, superficial water (rivers), groundwater in order to generate the new map. Could someone give me some tips on how to precess these data (individualy and all together)? Thank you in advance ... View more

I use ArcGiS 10.1 and I am doing some visibility analysis by using the viewshed tool. I need to set the vertical angle (VERT1-2) within a range between 0 and 180, but this parameter is enclosed between 90 and -90 so it didn’t permit me to calculate the visibility. Is there some way to perform this calculation? ... View more

Sample data from Roberto Filloramo's "Focal statistics problem values" question ... View more