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Merge pull request #53 from mapbox/badproj

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Add a warning when data appears to be in the wrong projection
This commit is contained in:
Eric Fischer
2015-06-05 10:24:13 -07:00
parent 1a95504390 263ae94e75
commit 448617e0a7
1 changed files with 14 additions and 0 deletions
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tile.cc
+14
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@@ -387,6 +387,9 @@ long long write_tile(char **geoms, char *metabase, unsigned *file_bbox, int z, u
double scale = (double) (1LL << (64 - 2 * (z + 8))); double scale = (double) (1LL << (64 - 2 * (z + 8)));
double gap = 0; double gap = 0;
long long original_features = 0;
long long unclipped_features = 0;
std::vector<std::vector<coalesce> > features; std::vector<std::vector<coalesce> > features;
for (i = 0; i < nlayers; i++) { for (i = 0; i < nlayers; i++) {
features.push_back(std::vector<coalesce>()); features.push_back(std::vector<coalesce>());
@@ -423,6 +426,8 @@ long long write_tile(char **geoms, char *metabase, unsigned *file_bbox, int z, u
oprogress = progress; oprogress = progress;
} }
original_features++;
int quick = quick_check(bbox, z, line_detail, buffer); int quick = quick_check(bbox, z, line_detail, buffer);
if (quick == 0) { if (quick == 0) {
continue; continue;
@@ -442,6 +447,10 @@ long long write_tile(char **geoms, char *metabase, unsigned *file_bbox, int z, u
geom = remove_noop(geom, t); geom = remove_noop(geom, t);
} }
if (geom.size() > 0) {
unclipped_features++;
}
if (line_detail == detail && fraction == 1) { /* only write out the next zoom once, even if we retry */ if (line_detail == detail && fraction == 1) { /* only write out the next zoom once, even if we retry */
if (geom.size() > 0 && z + 1 <= file_maxzoom) { if (geom.size() > 0 && z + 1 <= file_maxzoom) {
int j; int j;
@@ -654,6 +663,11 @@ long long write_tile(char **geoms, char *metabase, unsigned *file_bbox, int z, u
} }
} }
if (z == 0 && unclipped_features < original_features / 2) {
fprintf(stderr, "\n\nMore than half the features were clipped away at zoom level 0.\n");
fprintf(stderr, "Is your data in the wrong projection? (Not WGS84/EPSG:4326)\n");
}
long long totalsize = 0; long long totalsize = 0;
for (j = 0; j < nlayers; j++) { for (j = 0; j < nlayers; j++) {
totalsize += features[j].size(); totalsize += features[j].size();