X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;ds=sidebyside;f=src%2FKML.py;h=26e8e71d551437caa72617c52bdfe7ce41717774;hb=a288d4500730745bdd483c33c02411b9237b4a9f;hp=3279c858f29d42c69f7e825529031f89b685f177;hpb=b2537c605b2ad0e6b04bf1534d569f91f30f1594;p=dead%2Fcensus-tools.git
diff --git a/src/KML.py b/src/KML.py
index 3279c85..26e8e71 100644
--- a/src/KML.py
+++ b/src/KML.py
@@ -110,6 +110,69 @@ class Description(KmlObject):
+class LineString(KmlObject):
+
+ OPEN_TAG = ''
+ CLOSE_TAG = ''
+
+ @classmethod
+ def parse_linestrings(self, kml):
+ """
+ Parse each ... block from the KML.
+ """
+ linestrings = []
+
+ search_idx = kml.find(self.OPEN_TAG, 0)
+
+ while (search_idx != -1):
+ # No reason to keep the tag around.
+ ls_start = search_idx + len(self.OPEN_TAG)
+ ls_tag_end = kml.find(self.CLOSE_TAG, ls_start)
+ ls = kml[ ls_start : ls_tag_end ]
+ linestrings.append(ls)
+ search_idx = kml.find(self.OPEN_TAG, (ls_tag_end + len(self.CLOSE_TAG)))
+
+ return linestrings
+
+
+ @classmethod
+ def parse_coordinates_from_linestrings(self, linestrings):
+ coords = []
+
+ for ls in linestrings:
+ c_tag_start = ls.find('')
+ c_start = c_tag_start + len('')
+ c_end = ls.find('')
+ c = ls[ c_start : c_end ]
+ coords.append(c)
+
+ return coords
+
+
+ @classmethod
+ def tuples_from_kml(self, kml):
+ """
+ Parse one or more linestrings from a KML document.
+ Return a list of tuples.
+ """
+ ls = self.parse_linestrings(kml)
+ cs = self.parse_coordinates_from_linestrings(ls)
+
+ tuples = []
+
+ for c in cs:
+ pointstrings = c.strip().split()
+ for point in pointstrings:
+ components = point.strip().split(',')
+ if (len(components) >= 2):
+ # Project the three-dimensional vector onto the
+ # x-y plane. I don't think we're going to run
+ # in to any linestrings in 3d.
+ tuples.append( (float(components[0]), float(components[1])) )
+
+ return tuples
+
+
class Name(KmlObject):
OPEN_TAG = ''