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Drop or coalesce points too when dropping or coalescing smallest (#6)

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* Handle points too when dropping or coalescing the "smallest" features.

* Add statistics of tile size reduction strategies to tileset metadata

* Update changelog and version

* Update documentation
This commit is contained in:
Erica Fischer
2022-08-09 15:29:03 -07:00
committed by GitHub
parent 67cd9d8d85
commit c65d6938a4
63 changed files with 574 additions and 18 deletions
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tile.hpp
+36 -2
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@@ -19,9 +19,43 @@ enum attribute_op {
op_min,
};
long long write_tile(char **geom, char *metabase, char *stringpool, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int min_detail, int basezoom, sqlite3 *outdb, const char *outdir, double droprate, int buffer, const char *fname, FILE **geomfile, int file_minzoom, int file_maxzoom, double todo, char *geomstart, long long along, double gamma, int nlayers);
struct atomic_strategy {
std::atomic<size_t> dropped_by_rate;
std::atomic<size_t> dropped_by_gamma;
std::atomic<size_t> dropped_as_needed;
std::atomic<size_t> coalesced_as_needed;
std::atomic<size_t> detail_reduced;
int traverse_zooms(int *geomfd, off_t *geom_size, char *metabase, char *stringpool, std::atomic<unsigned> *midx, std::atomic<unsigned> *midy, int &maxzoom, int minzoom, sqlite3 *outdb, const char *outdir, int buffer, const char *fname, const char *tmpdir, double gamma, int full_detail, int low_detail, int min_detail, long long *meta_off, long long *pool_off, unsigned *initial_x, unsigned *initial_y, double simplification, std::vector<std::map<std::string, layermap_entry> > &layermap, const char *prefilter, const char *postfilter, std::map<std::string, attribute_op> const *attribute_accum, struct json_object *filter);
atomic_strategy() :
dropped_by_rate(0),
dropped_by_gamma(0),
dropped_as_needed(0),
coalesced_as_needed(0),
detail_reduced(0) {
}
};
struct strategy {
size_t dropped_by_rate = 0;
size_t dropped_by_gamma = 0;
size_t dropped_as_needed = 0;
size_t coalesced_as_needed = 0;
size_t detail_reduced = 0;
strategy(const atomic_strategy &s) {
dropped_by_rate = s.dropped_by_rate;
dropped_by_gamma = s.dropped_by_gamma;
dropped_as_needed = s.dropped_as_needed;
coalesced_as_needed = s.coalesced_as_needed;
detail_reduced = s.detail_reduced;
}
strategy() = default;
};
long long write_tile(char **geom, char *metabase, char *stringpool, unsigned *file_bbox, int z, unsigned x, unsigned y, int detail, int min_detail, int basezoom, sqlite3 *outdb, const char *outdir, double droprate, int buffer, const char *fname, FILE **geomfile, int file_minzoom, int file_maxzoom, double todo, char *geomstart, long long along, double gamma, int nlayers, std::atomic<strategy> *strategy);
int traverse_zooms(int *geomfd, off_t *geom_size, char *metabase, char *stringpool, std::atomic<unsigned> *midx, std::atomic<unsigned> *midy, int &maxzoom, int minzoom, sqlite3 *outdb, const char *outdir, int buffer, const char *fname, const char *tmpdir, double gamma, int full_detail, int low_detail, int min_detail, long long *meta_off, long long *pool_off, unsigned *initial_x, unsigned *initial_y, double simplification, std::vector<std::map<std::string, layermap_entry> > &layermap, const char *prefilter, const char *postfilter, std::map<std::string, attribute_op> const *attribute_accum, struct json_object *filter, std::vector<strategy> &strategies);
int manage_gap(unsigned long long index, unsigned long long *previndex, double scale, double gamma, double *gap);