You can check here for five free DEM download sites. I would recommend SRTM (Shuttle Radar Topography Mission). You can download 30m resolution over your area of interest. I did one recently but resample from the site to 10m before downloading. All the best
I am enthusiastic how I can create extension same as GIS.XL for LibreOffice instead of Microsoft Excel!?
I am going to know where should I start?
The GIS.XL add-in provides features and functions for work with spatial data directly inside the Excel environment. Add-in includes a standard interface, familiar from other GIS programs - Map and Legend. Combine Excel (tabular data) and spatial (map) data in layers.
So i was trying to create a image interpretation key for this picture: https://imgur.com/gallery/pbs31lQ sadly i haven´t understood the image interpretation keys so good, and on internet i couldn´t find a concrete example. Could anyone create a image interpretation key for the following classes: Meadow, Agriculture, House / building, Road and this criteria: colour, texture, structure, size, shape and context for each of them. It would help me alot at understanding how the image interpretation key construction exactly works. Thanks.
In your new graph each high value correspond to near distance... is like high value are inverse to distance ....if you use reclass in arctoolboxs can define por each class the value require ... here get a print screen done by me https://ibb.co/0KCj079 check there area different options to reclassify a raster...