debug info to stderr, fix geojson list

create-geojson.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env sh
 for file in $(ls *-csv) ; do
-	out=$(echo ${file}|cut -d- -f1)
-	test -e ${out}".geojson" && { echo "file exists: "${out}", skipping."; continue; }
+	out=$(echo ${file}|cut -d- -f1)".geojson"
+	test -e ${out} && { echo "file exists: "${out}", skipping."; continue; }
 	echo ./lookup.py ${file}
-	./lookup.py ${file} > ${out}".geojson"
+	./lookup.py ${file} 2>/dev/null > ${out}
 done

lookup.py

@@ -1,37 +1,55 @@
 #!/usr/bin/env python3
 
+from __future__ import print_function
 from geopy import Nominatim
 # ~ import json
 import sys
 
+import sys
+
+# debug print to stderr, https://stackoverflow.com/questions/5574702/how-to-print-to-stderr-in-python
+def eprint(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+
 # ~ fn="ct-csv"
 if len(sys.argv) == 2:
 	fn = sys.argv[1]
 else:
-	print("in case you do know know what you are doing, better call via e.g. `create-geojson.sh`.\n");
-	print("expecting one argument: csv-file.");
-	print("received "+str(len(sys.argv))+" argument(s): "+str(sys.argv));
+	eprint("in case you do know know what you are doing, better call via e.g. `create-geojson.sh`.\n");
+	eprint("expecting one argument: csv-file.");
+	eprint("received "+str(len(sys.argv))+" argument(s): "+str(sys.argv));
 	sys.exit(1) # exit with error
 
 # for retreiving geo coordinates from addresses
 geolocator = Nominatim(user_agent="my-mapper")
 # lat: 0=111,1km,1=11km,2=1km… lng: 0=70km,1=7km,2=.7km…
 precision = 2
+
+# convert csv to geojson
+
+firstline = true	
+# start json list
+print ( "[" )
 # get data from file
 with open( fn, 'r' ) as fp:
     for place in fp:
         #error handling: expect
         arrAddress = place.split(",")
         strAddress = ",".join(arrAddress[2:5])
-        print( strAddress )
+        eprint( "looking up: "+strAddress )
         location = geolocator.geocode( strAddress )
         if location is not None: # its a class
             # todo: ceil coords to hide true location in format string
             # ~ strCoordPlace = '{:s},{:.6f},{:.6f}'.format( arrAddress[3], location.latitude, location.longitude ) 
             geojson = '{{"type":"Feature","geometry":{{"type":"Point","coordinates":[{:.'+str(precision)+'f},{:.'+str(precision)+'f}]}},"properties":{{"name":"{:s}","marker":"{:s}"}}}}';
             strCoordPlace = geojson.format( location.latitude, location.longitude, arrAddress[1], fn.split("-")[0] ) 
-            # ~ {"type": "Feature","geometry": {"type": "Point","coordinates":[125.6, 10.1]},"properties":{"name":"Dinagat Islands"}}
+            if firstline == false:
+				print (",")
+		    else
+				firstline = false
             print ( strCoordPlace )
+# end json list
+print ( "]" )
 
 # exit fine
 sys.exit(0)