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Add a decode option to translate the entire tileset into GeoJSON

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This commit is contained in:
Eric Fischer
2015-10-19 11:12:11 -07:00
parent f64e2c94e2
commit 89e1640496
1 changed files with 61 additions and 20 deletions
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decode.cc
+61 -20
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@@ -78,7 +78,7 @@ struct draw {
} }
}; };
void handle(std::string message, int z, unsigned x, unsigned y) { void handle(std::string message, int z, unsigned x, unsigned y, int describe) {
GOOGLE_PROTOBUF_VERIFY_VERSION; GOOGLE_PROTOBUF_VERIFY_VERSION;
int within = 0; int within = 0;
@@ -97,7 +97,13 @@ void handle(std::string message, int z, unsigned x, unsigned y) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
printf("{ \"type\": \"FeatureCollection\", \"features\": [\n"); printf("{ \"type\": \"FeatureCollection\"");
if (describe) {
printf(", \"properties\": { \"zoom\": %d, \"x\": %d, \"y\": %d }", z, x, y);
}
printf(", \"features\": [\n");
for (int l = 0; l < tile.layers_size(); l++) { for (int l = 0; l < tile.layers_size(); l++) {
mapnik::vector::tile_layer layer = tile.layers(l); mapnik::vector::tile_layer layer = tile.layers(l);
@@ -319,36 +325,68 @@ void decode(char *fname, int z, unsigned x, unsigned y) {
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
int handled = 0; if (z < 0) {
while (z >= 0 && !handled) { const char *sql = "SELECT tile_data, zoom_level, tile_column, tile_row from tiles order by zoom_level, tile_column, tile_row;";
const char *sql = "SELECT tile_data from tiles where zoom_level = ? and tile_column = ? and tile_row = ?;";
sqlite3_stmt *stmt; sqlite3_stmt *stmt;
if (sqlite3_prepare_v2(db, sql, -1, &stmt, NULL) != SQLITE_OK) { if (sqlite3_prepare_v2(db, sql, -1, &stmt, NULL) != SQLITE_OK) {
fprintf(stderr, "%s: select failed: %s\n", fname, sqlite3_errmsg(db)); fprintf(stderr, "%s: select failed: %s\n", fname, sqlite3_errmsg(db));
exit(EXIT_FAILURE); exit(EXIT_FAILURE);
} }
sqlite3_bind_int(stmt, 1, z); printf("{ \"type\": \"FeatureCollection\", \"features\": [\n");
sqlite3_bind_int(stmt, 2, x);
sqlite3_bind_int(stmt, 3, (1LL << z) - 1 - y);
int within = 0;
while (sqlite3_step(stmt) == SQLITE_ROW) { while (sqlite3_step(stmt) == SQLITE_ROW) {
if (within) {
printf(",\n");
}
within = 1;
int len = sqlite3_column_bytes(stmt, 0); int len = sqlite3_column_bytes(stmt, 0);
int z = sqlite3_column_int(stmt, 1);
int x = sqlite3_column_int(stmt, 2);
int y = sqlite3_column_int(stmt, 3);
y = (1LL << z) - 1 - y;
const char *s = (const char *) sqlite3_column_blob(stmt, 0); const char *s = (const char *) sqlite3_column_blob(stmt, 0);
if (z != oz) { handle(std::string(s, len), z, x, y, 1);
fprintf(stderr, "%s: Warning: using tile %d/%u/%u instead of %d/%u/%u\n", fname, z, x, y, oz, ox, oy);
}
handle(std::string(s, len), z, x, y);
handled = 1;
} }
sqlite3_finalize(stmt); printf("] }\n");
z--; sqlite3_finalize(stmt);
x /= 2; } else {
y /= 2; int handled = 0;
while (z >= 0 && !handled) {
const char *sql = "SELECT tile_data from tiles where zoom_level = ? and tile_column = ? and tile_row = ?;";
sqlite3_stmt *stmt;
if (sqlite3_prepare_v2(db, sql, -1, &stmt, NULL) != SQLITE_OK) {
fprintf(stderr, "%s: select failed: %s\n", fname, sqlite3_errmsg(db));
exit(EXIT_FAILURE);
}
sqlite3_bind_int(stmt, 1, z);
sqlite3_bind_int(stmt, 2, x);
sqlite3_bind_int(stmt, 3, (1LL << z) - 1 - y);
while (sqlite3_step(stmt) == SQLITE_ROW) {
int len = sqlite3_column_bytes(stmt, 0);
const char *s = (const char *) sqlite3_column_blob(stmt, 0);
if (z != oz) {
fprintf(stderr, "%s: Warning: using tile %d/%u/%u instead of %d/%u/%u\n", fname, z, x, y, oz, ox, oy);
}
handle(std::string(s, len), z, x, y, 0);
handled = 1;
}
sqlite3_finalize(stmt);
z--;
x /= 2;
y /= 2;
}
} }
if (sqlite3_close(db) != SQLITE_OK) { if (sqlite3_close(db) != SQLITE_OK) {
@@ -371,11 +409,14 @@ int main(int argc, char **argv) {
usage(argv); usage(argv);
} }
if (argc != optind + 4) { if (argc == optind + 4) {
decode(argv[optind], atoi(argv[optind + 1]), atoi(argv[optind + 2]), atoi(argv[optind + 3]));
} else if (argc == optind + 1) {
decode(argv[optind], -1, -1, -1);
} else {
usage(argv); usage(argv);
} }
decode(argv[optind], atoi(argv[optind + 1]), atoi(argv[optind + 2]), atoi(argv[optind + 3]));
return 0; return 0;
} }