(GIS) Mapping the Buildings in Agdal with Cats.....

Just as we were moving to Rabat, I got an inquiry about my MICRODEM GIS program.  The user wanted more control over the pattern fill.  Now that we are settled in, I got around to making the change.  Actually, the capability has been there for a while, but I haven't used it, and it was not particularly laid out in the documentation.

Now you can use "any bitmap" as the brush for pattern fills.  I have not tested an upper limit (I have been to 100x100 pixels, and you probably won't get good results above that, and likely not with that.

First test, with a kitten picture.

Second test, with a selfie.   Why?  Because I can.  There's a white border, which is only partly transparent because it was a JPEG and that makes some of the white "not quite white" and thus not transparent.

Third test, a limestone brick pattern, which you might actually want.  The program has almost 200 patterns, which tile automatically, back from the days when they were used for geologic stratigraphic  columns.  It's now called a map pattern editor.

Playing around with this, for our Adgal neighborhood, shows some of the quirks in the OpenStreetMap data, which is crowd-sourced like Wikipedia.  The map above shows a road going into (under?) a building; we have to walk by that the next time we are out.  This map shows extreme detail in the buildings in the south part of the neighborhood, and hardly anything to the north.  I've noticed the same thing back home; the area around Severna Park is well mapped, but the adjacent area near Chesapeake High School is not.