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Use the same default ground precision whatever the base zoom is.

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This commit is contained in:
Eric Fischer 2014-10-27 14:33:09 -07:00
parent a09bf3469d
commit 984ac17d6c
2 changed files with 9 additions and 2 deletions
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2
README.md
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@ -22,7 +22,7 @@ Options
* -n <i>name</i>: Human-readable name (default file.json)
* -z <i>zoom</i>: Base zoom level (default 14)
* -Z <i>zoom</i>: Lowest zoom level (default 0)
* -d <i>detail</i>: Detail at base zoom level (default 12, for tile resolution of 4096)
* -d <i>detail</i>: Detail at base zoom level (default 26-basezoom, ~0.5m, for tile resolution of 4096 if -z14)
* -D <i>detail</i>: Detail at lower zoom levels (default 10, for tile resolution of 1024)
* -x <i>name</i>: Exclude the named properties from all features
* -X: Exclude all properties and encode only geometries

9
geojson.c
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@ -20,7 +20,7 @@
#include "projection.h"
int low_detail = 10;
int full_detail = 12;
int full_detail = -1;
#define GEOM_POINT 0 /* array of positions */
#define GEOM_MULTIPOINT 1 /* array of arrays of positions */
@ -581,6 +581,13 @@ int main(int argc, char **argv) {
}
}
if (full_detail <= 0) {
// ~0.5m accuracy at whatever zoom
// 12 bits (4096 units) at z14
full_detail = 26 - maxzoom;
}
if (outdir == NULL) {
fprintf(stderr, "%s: must specify -o out.mbtiles\n", argv[0]);
exit(EXIT_FAILURE);