Latest Contributions by MartinaTalacchia

Wow thank you very much! It worked perfectly  Grazie! ... View more

Hi Dan, Thanks a lot for your answer. So my suitability model counts so far 6 different variables: slope, population density, distance to public transports, to communities venue, to schools and universities as well. They were previously vector data that I transformed into raster when I calculated the distance (except for the slope which was already a raster obtained from the elevation naturally). Afterward, I run the reclassify tool in order to find those vacant lands close to areas with high density of population, little slope and close to all the amenities I listed above. Finally, I used the weighted overlay. I already got a shapefile containing the polygons of the current vacant lands but I sincerely don't know how to insert that variable in the suitability model without affect the results. I plan to overcome that by doing a 'selection by location' on the areas with the highest suitability range obtained from the model I described you above.  I got the software license thanks to the university so I can access to all the range of products inside ArcGis but I don't know how to use other software apart from Envi. I'm not prepared at all on statistics but, if I'll just need the understanding of unadvanced topics, I can always have a look of the literature I guess.  Following the definition that you also wrote, it would be too simplistic if I just change the % of influence when I'm doing the weighted overlay?  I read somewhere that when performing the SA we should pick the variables which in our opinion have the highest importance. In this case for me were the proximity to high-density population areas to schools and transports. Although perhaps I would need to figure out from how to calculate the statistics in order to show what I did... I'm a bit lost.. ... View more

Hi Dan, Thank you for your reply. It was previously a vector layer representing the land use of Naples in form of polygons. I did a bit of editing on it, I selected only some areas and eventually I added few more polygons with the Editor tool. After that I converted the vector into a raster layer with the Conversion tool "polygon to raster". The size extent is top: 4542695,9645 right: 951322,4801 bottom: 4528535,9645 left: 932662,4801 Is there any other information I should provide you that may help to understand where is the issue? And yes, I tried to run Reclassify of this layer on a different map but actually I got the same result. I also tried to repeat all the passages I said above from the original vector layer once again but.. nothing ... View more