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Merge pull request #27 from sfomuseum/metadata
Add methods and tools to ensure spatial metadata properties for MBTiles databases
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| package main | ||
|
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||
| import ( | ||
| "flag" | ||
| "log" | ||
|
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| "github.com/paulmach/orb" | ||
| "github.com/paulmach/orb/maptile" | ||
| "github.com/tilezen/go-tilepacks/tilepack" | ||
| ) | ||
|
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| func main() { | ||
|
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| var verify bool | ||
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| flag.BoolVar(&verify, "verify", false, "Verify that spatial metadata was written to each database") | ||
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| flag.Parse() | ||
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| for _, path := range flag.Args() { | ||
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| mbtilesReader, err := tilepack.NewMbtilesReader(path) | ||
|
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| if err != nil { | ||
| log.Fatalf("Couldn't read input mbtiles %s: %+v", path, err) | ||
| } | ||
|
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| var bounds *orb.Bound | ||
| minZoom := uint(20) | ||
| maxZoom := uint(0) | ||
|
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| err = mbtilesReader.VisitAllTiles(func(t maptile.Tile, data []byte) { | ||
|
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| tb := t.Bound() | ||
|
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| if bounds == nil { | ||
| bounds = &tb | ||
| } else { | ||
| tb = bounds.Union(tb) | ||
| bounds = &tb | ||
| } | ||
|
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| minZoom = min(minZoom, uint(t.Z)) | ||
| maxZoom = max(maxZoom, uint(t.Z)) | ||
| }) | ||
|
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| if err != nil { | ||
| log.Fatalf("Couldn't read tiles from %s: %+v", path, err) | ||
| } | ||
|
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| mbtilesReader.Close() | ||
|
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| mbtilesWriter, err := tilepack.NewMbtilesOutputter(path, 0) | ||
|
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| if err != nil { | ||
| log.Fatalf("Couldn't read input mbtiles %s: %+v", path, err) | ||
| } | ||
|
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| err = mbtilesWriter.AssignSpatialMetadata(*bounds, maptile.Zoom(minZoom), maptile.Zoom(maxZoom)) | ||
|
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| if err != nil { | ||
| log.Fatalf("Failed to assign spatial metadata to %s: %+v", path, err) | ||
| } | ||
|
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| mbtilesWriter.Close() | ||
|
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| if verify { | ||
|
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| mbtilesReader, err := tilepack.NewMbtilesReader(path) | ||
|
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| if err != nil { | ||
| log.Fatalf("Couldn't read input mbtiles %s: %+v", path, err) | ||
| } | ||
|
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| metadata, err := mbtilesReader.Metadata() | ||
|
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| if err != nil { | ||
| log.Fatalf("Unable to read metadata for %s, %v", path, err) | ||
| } | ||
|
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| bounds, err := metadata.Bounds() | ||
|
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| if err != nil { | ||
| log.Fatalf("Failed to derive bounds metadata after update") | ||
| } | ||
|
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| center, err := metadata.Center() | ||
|
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| if err != nil { | ||
| log.Fatalf("Failed to derive bounds metadata after update") | ||
| } | ||
|
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| minZoom, err := metadata.MinZoom() | ||
|
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| if err != nil { | ||
| log.Fatalf("Failed to derive min zoom metadata after update") | ||
| } | ||
|
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| maxZoom, err := metadata.MaxZoom() | ||
|
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| if err != nil { | ||
| log.Fatalf("Failed to derive max zoom metadata after update") | ||
| } | ||
|
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| log.Printf("[%s] bounds: %v center: %v zoom: %d-%d\n", path, bounds, center, minZoom, maxZoom) | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,11 +1,20 @@ | ||
| module github.com/tilezen/go-tilepacks | ||
|
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| go 1.12 | ||
| go 1.23 | ||
|
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| require ( | ||
| github.com/aaronland/go-string v1.0.0 | ||
| github.com/aws/aws-sdk-go v1.44.65 | ||
| github.com/mattn/go-sqlite3 v1.14.14 | ||
| github.com/paulmach/orb v0.9.0 | ||
| github.com/schollz/progressbar/v3 v3.13.0 | ||
| github.com/aws/aws-sdk-go v1.55.5 | ||
| github.com/mattn/go-sqlite3 v1.14.23 | ||
| github.com/paulmach/orb v0.11.1 | ||
| github.com/schollz/progressbar/v3 v3.14.6 | ||
| ) | ||
|
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| require ( | ||
| github.com/jmespath/go-jmespath v0.4.0 // indirect | ||
| github.com/mitchellh/colorstring v0.0.0-20190213212951-d06e56a500db // indirect | ||
| github.com/rivo/uniseg v0.4.7 // indirect | ||
| go.mongodb.org/mongo-driver v1.11.4 // indirect | ||
| golang.org/x/sys v0.22.0 // indirect | ||
| golang.org/x/term v0.22.0 // indirect | ||
| ) |
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