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Move feature type to index so point skipping can avoid looking up geometry

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Which should avoid having to page the geometry in if there is
more data than will fit in memory
This commit is contained in:
Eric Fischer 2014-11-05 12:17:12 -08:00
parent bc4527b25d
commit c24cfada61
3 changed files with 5 additions and 6 deletions
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2
geojson.c
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@ -381,7 +381,6 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
unsigned bbox[] = { UINT_MAX, UINT_MAX, 0, 0 };
serialize_int(metafile, mb_geometry[t], &fpos, fname, jp);
parse_geometry(t, coordinates, bbox, &fpos, metafile, VT_MOVETO, fname, jp);
serialize_int(metafile, VT_END, &fpos, fname, jp);
@ -467,6 +466,7 @@ void read_json(FILE *f, char *fname, char *layername, int maxzoom, int minzoom,
ix.index = encode(x << (32 - z), y << (32 - z));
}
ix.fpos = start;
ix.type = mb_geometry[t];
ix.maxzoom = z;
fwrite_check(&ix, sizeof(struct index), 1, indexfile, fname, jp);
}

6
tile.cc
View File

@ -376,10 +376,7 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
}
dup.insert(std::pair<long long, int>(i->fpos, 1));
int t;
char *meta = metabase + i->fpos;
deserialize_int(&meta, &t);
int t = i->type;
if (t == VT_POINT) {
seq++;
@ -390,6 +387,7 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
}
}
char *meta = metabase + i->fpos;
drawvec geom = decode_geometry(&meta, z, tx, ty, line_detail);
bool reduced = false;

3
tile.h
View File

@ -19,8 +19,9 @@ struct pool_val *deserialize_string(char **f, struct pool *p, int type);
struct index {
unsigned long long index;
long long fpos : 56;
long long fpos : 48;
int maxzoom : 8;
int type : 8;
};
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);