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Make duplicate trimming less bad: only trim features indexed >1 time

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This commit is contained in:
Eric Fischer
2014-11-06 11:27:10 -08:00
parent 7f6a5dc005
commit ea292def47
3 changed files with 49 additions and 33 deletions
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geojson.c
+13
View File
@@ -448,6 +448,10 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
ix.maxzoom = z;
fwrite_check(&ix, sizeof(struct index), 1, indexfile, fname, jp);
} else {
int pass;
int instances = 0;
for (pass = 0; pass < 2; pass++) {
for (z = maxzoom; z >= 1; z--) {
unsigned x, y;
for (x = (bbox[0] - (buffer << (32 - z - 8))) >> (32 - z); x <= (bbox[2] + (buffer << (32 - z - 8))) >> (32 - z); x++) {
@@ -470,6 +474,12 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
}
}
if (pass == 0) {
instances++;
if (instances > 1) {
break;
}
} else {
struct index ix;
if (x == cx >> (32 - z) && y == cy >> (32 - z)) {
@@ -480,11 +490,14 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
ix.fpos = start;
ix.type = mb_geometry[t];
ix.maxzoom = z;
ix.candup = (instances > 1);
fwrite_check(&ix, sizeof(struct index), 1, indexfile, fname, jp);
}
}
}
}
}
}
for (i = 0; i < 2; i++) {
if (bbox[i] < file_bbox[i]) {
tile.cc
+2
View File
@@ -371,10 +371,12 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
continue;
}
if (i->candup) {
if (dup.count(i->fpos) != 0) {
continue;
}
dup.insert(std::pair<long long, int>(i->fpos, 1));
}
int t = i->type;
if (t == VT_POINT) {
tile.h
+2 -1
View File
@@ -22,7 +22,8 @@ struct index {
unsigned long long index;
long long fpos : 48;
int maxzoom : 8;
int type : 8;
int type : 7;
int candup : 1;
};
long long write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int basezoom, struct pool *file_keys, char *layername, sqlite3 *outdb, double droprate, int buffer);