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* src/tile_worker.cpp: ignore points too far out of the valid tile. #874

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* src/tile_worker.cpp: ignore points too far out of the valid tile. #874

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20 changes: 18 additions & 2 deletions src/tile_worker.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -293,16 +293,32 @@ void ProcessObjects(
// so that we can write a multipoint instead of many point features

std::vector<std::pair<int, int>> multipoint;
const int tile_extent = bbox.hires ? 8192 : 4096;
const int margin = 256; // Just in case something happens near the edges.

LatpLon pos = source->buildNodeGeometry(jt->oo.objectID, bbox);
pair<int,int> xy = bbox.scaleLatpLon(pos.latp/10000000.0, pos.lon/10000000.0);
multipoint.push_back(xy);

// Filter out points that are way beyond the reasonable tile extent
if (xy.first >= -margin && xy.first <= tile_extent + margin &&
xy.second >= -margin && xy.second <= tile_extent + margin) {
multipoint.push_back(xy);
}

while (jt<(ooSameLayerEnd-1) && oo.oo.compatible((jt+1)->oo) && combinePoints) {
jt++;
LatpLon pos = source->buildNodeGeometry(jt->oo.objectID, bbox);
pair<int,int> xy = bbox.scaleLatpLon(pos.latp/10000000.0, pos.lon/10000000.0);
multipoint.push_back(xy);

if (xy.first >= -margin && xy.first <= tile_extent + margin &&
xy.second >= -margin && xy.second <= tile_extent + margin) {
multipoint.push_back(xy);
}
}

if (multipoint.empty()) {
oo = *jt;
continue;
}

vtzero::point_feature_builder fbuilder{vtLayer};
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