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Rescale geometry if layer extents don't match

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This commit is contained in:
Eric Fischer 2016-09-19 16:25:30 -07:00
parent a37fc361c2
commit 8d57f031ee
1 changed files with 20 additions and 5 deletions
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25
tile-join.cpp
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@ -52,13 +52,21 @@ void handle(std::string message, int z, unsigned x, unsigned y, std::vector<std:
outtile.layers[ol].extent = layer.extent;
}
if (tile.layers[l].extent != outtile.layers[ol].extent) {
fprintf(stderr, "Mismatched extents: %d vs %d\n", tile.layers[l].extent, outtile.layers[ol].extent);
exit(EXIT_FAILURE);
}
mvt_layer &outlayer = outtile.layers[ol];
if (layer.extent != outlayer.extent) {
if (layer.extent > outlayer.extent) {
for (size_t i = 0; i < outlayer.features.size(); i++) {
for (size_t j = 0; j < outlayer.features[i].geometry.size(); j++) {
outlayer.features[i].geometry[j].x = outlayer.features[i].geometry[j].x * layer.extent / outlayer.extent;
outlayer.features[i].geometry[j].y = outlayer.features[i].geometry[j].y * layer.extent / outlayer.extent;
}
}
outlayer.extent = layer.extent;
}
}
const char *ln = layer.name.c_str();
int ll;
@ -174,6 +182,13 @@ void handle(std::string message, int z, unsigned x, unsigned y, std::vector<std:
outfeature.type = feat.type;
outfeature.geometry = feat.geometry;
if (layer.extent != outlayer.extent) {
for (size_t i = 0; i < outfeature.geometry.size(); i++) {
outfeature.geometry[i].x = outfeature.geometry[i].x * outlayer.extent / layer.extent;
outfeature.geometry[i].y = outfeature.geometry[i].y * outlayer.extent / layer.extent;
}
}
features_added++;
outlayer.features.push_back(outfeature);
}