Support of EPSG:3301 (inverted coordinates)

[OverQuantum]

Need support of projection EPSG:3301
For tracing trace Maaamet map from kaart.maaamet.ee, it works only in projection EPSG:3301

My attempt to add support by myself failed on inverted tile order.

1. Set up scanaerial.cfg:
   wms_server_url = http://kaart.maaamet.ee/wms/kaart?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=MA-KAART&STYLES=&
   projection = EPSG:3301
   tile_sizex = 500
   tile_sizey = 500

2. Added following to projections.py:
   "EPSG:3301":{
   "proj": pyproj.Proj("+proj=lcc +lat_1=59.33333333333334 +lat_2=58 +lat_0=57.51755393055556 +lon_0=24 +x_0=500000 +y_0=6375000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs"),
   "bounds": (57.5700, 21.8400, 59.7000, 28.0000),
   },

3. Changed a<=>c in bbox forming in canvas.py into:
   return self.wms_url + "width=%s&height=%s&srs=%s&bbox=%s,%s,%s,%s" % (self.tile_width, self.tile_height, self.proj, c, b, a, d)

4. Result look like this:
   
   I assume, tiles needed to be mirrored horizontally.

[jonasstein]

something strange seems to happen with the decimals. You could try to print() the variables in the calculation.

[OverQuantum]

Actually, I have managed to mirror tiles by
tile_data = tile_data.transpose(Image.FLIP_LEFT_RIGHT)

but looks like requested tiles are very tall, here is log with added printing of remote var:
c:\Python26\python.exe d:\Tools\JOSM\scanaerial\scanaerial.py 59.5026057047151 26.512555010267505 15
loading tile: http://kaart.maaamet.ee/wms/kaart?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=MA-KAART&STYLES=&width=200&height=200&srs=EPSG:3301&bbox=642263.403282,6598751.61279,642277.641735,6598800.07988
Download took 0.22230920063 sec
could not be loaded, blanking tile
could not be loaded, blanking tile
loading tile: http://kaart.maaamet.ee/wms/kaart?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=MA-KAART&STYLES=&width=200&height=200&srs=EPSG:3301&bbox=642273.974168,6598751.61283,642288.212891,6598800.07984
Download took 0.187359594308 sec
could not be loaded, blanking tile

And result looks like following: