It turns out that while AREA is not an Oracle reserved word, the reason I have also seen this on Microsoft SQL-Backed geodatabases as well, is that AREA is, in fact, a fully qualified geodatabase word.
That link actually states my exact issue:
Certain field names appear in ArcGIS with their fully qualified names
for tables stored within an enterprise ...
The solution for QGIS,
I propose to act on the following scenario,
"while I am kind :-)",
If I understand you correctly, the initial situation is as shown in Figure 1 and my test layers are called "pts" and "polygon_exp".
Action 1, using the new virtual layer with the SQL script in the form window add 2 layers to the screen ...
If you're talking about the icons inside the application itself, you can find many of them by doing a search for *.png in the application install directory. Of course what you may want to do with those icons will probably be covered by the terms of service you accept when you install the software.
If you're talking about the more 'marketing-like' icons you ...
Unfortunately it is very common situation, especially for some multi-disciplinary corporations. They even call GIS a new technology... Solution is simple.
Draw rectangle around you inflated drawing and extract vertices to point shapefile. Add geometry attributes to resulting 5 points. Apply this expression in field calculator on field Shape:
RivEX can link sites, assuming the network is not huge. But I doubt any tool will tell you if the relative direction is u/s or d/s. How do you measure if something is d/s of you, you could initially head down stream then head of up a tributary much further, is that considered "downstream". Elevation won't necessarily guarantee if something is d/s, ...
ArcGIS computes statistics from samples in the symbology process. You need to help ArcGIS to compute as sometimes NoData-values are the problem. Do the following in ArcCatalog:
Right-click the raster > choose Raster Dataset Properties
In panel General:
Raster Information \ NoData Value: provide a NoData-value if it exists for the raster