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don't crash with empty GeometryIndexed

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Laura Klünder 2017-11-17 14:05:33 +01:00
parent 988ca66dc3
commit 8896360362
1 changed files with 5 additions and 4 deletions
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9
src/c3nav/mapdata/cache.py
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@ -168,10 +168,11 @@ class GeometryIndexed:
image_data = np.zeros((int(math.ceil((maxy-miny)/self.resolution)),
int(math.ceil((maxx-minx)/self.resolution))), dtype=np.uint8)
minval = max(self.data.min(), 0)
maxval = max(self.data.max(), minval+0.01)
visible_data = (self.data.astype(float)-minval*255/(maxval-minval)).clip(0, 255).astype(np.uint8)
image_data[self.y:self.y+height, self.x:self.x+width] = visible_data
if self.data.size:
minval = max(self.data.min(), 0)
maxval = max(self.data.max(), minval+0.01)
visible_data = (self.data.astype(float)-minval*255/(maxval-minval)).clip(0, 255).astype(np.uint8)
image_data[self.y:self.y+height, self.x:self.x+width] = visible_data
return Image.fromarray(np.flip(image_data, axis=0), 'L')