Python script to covert GeoTiff .CLR file to a Carto style for CartoDB

clr2carto.py

import sys

args = []
for arg in sys.argv:
	args.append(arg)

try: 
	clr_file = args[1] #'glc2000_v1_1.clr'
except:
	print """ You must supply an input .CLR filename.
python clr2carto.py {filename} {optional: value_column_name} {optional: target_table}"""
try:
	value_column_name = args[2]
except:
	value_column_name = 'rast_value'
try:
	cartodb_tablename = args[3]
except:
	cartodb_tablename = clr_file.rsplit('.',1)[0].replace('.','_').replace(' ','_').replace('-','_')


delimiter = ' '

raster_styles = ''
for line in open(clr_file):
    li=line.strip()
    if not li.startswith("#") and li.strip() != '':
    	params = line.strip().split(delimiter)
    	cell_val = params.pop(0)
    	rgb = 'rgb(%s)' % ','.join(str(x) for x in params)
    	raster_styles += "\n   [%s = %s]{ polygon-fill: %s }" % (value_column_name, cell_val, rgb)

default_output = """#%s {
   polygon-fill:#FF6600;
   polygon-opacity: 0.7;
   line-opacity:1;
   line-color: #FFFFFF;%s
}""" % (cartodb_tablename, raster_styles)

f = open('CartoDB.carto.css','w+').write(default_output)