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Mapnik zoom level issue test cases
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.md

Failure

Map XML (within tilelive bridge)

<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" buffer-size="256" base="/Users/mapsam/mapbox/tilelive-bridge/" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
  <Parameters>
    <Parameter name="bounds">-71.547459,42.834546,-71.534092,42.845709</Parameter>
    <Parameter name="center">-71.5407755,42.8401275,0</Parameter>
    <Parameter name="format">pbf</Parameter>
    <Parameter name="json">{&quot;vector_layers&quot;:[{&quot;id&quot;:&quot;test_case_fails&quot;,&quot;description&quot;:&quot;&quot;,&quot;minzoom&quot;:0,&quot;maxzoom&quot;:22,&quot;fields&quot;:{}}]}</Parameter>
    <Parameter name="maxzoom">13</Parameter>
    <Parameter name="minzoom">0</Parameter>
  </Parameters>
  <Layer name="test_case_fails" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs" buffer-size="8">
    <Datasource>
      <Parameter name="cache_features">false</Parameter>
      <Parameter name="file">/Users/mapsam/data/unpacker-failures/bug_example/test_case_fails.geojson</Parameter>
      <Parameter name="layer">test_case_fails</Parameter>
      <Parameter name="type">geojson</Parameter>
    </Datasource>
  </Layer>
</Map>

Pyramid (generated in tilelive with XML and spherical mercator)

{ 
  '0': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
  '1': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
  '2': { minX: 1, minY: 1, maxX: 1, maxY: 1 },
  '3': { minX: 2, minY: 2, maxX: 2, maxY: 2 },
  '4': { minX: 4, minY: 5, maxX: 4, maxY: 5 },
  '5': { minX: 9, minY: 11, maxX: 9, maxY: 11 },
  '6': { minX: 19, minY: 23, maxX: 19, maxY: 23 },
  '7': { minX: 38, minY: 47, maxX: 38, maxY: 47 },
  '8': { minX: 77, minY: 94, maxX: 77, maxY: 94 },
  '9': { minX: 154, minY: 188, maxX: 154, maxY: 188 },
  '10': { minX: 308, minY: 376, maxX: 308, maxY: 376 },
  '11': { minX: 616, minY: 753, maxX: 617, maxY: 753 },
  '12': { minX: 1233, minY: 1507, maxX: 1234, maxY: 1507 },
  '13': { minX: 2467, minY: 3014, maxX: 2468, maxY: 3015 }
}

Success

Map XML (within tilelive-bridge)

<Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0.0 +k=1.0 +units=m +nadgrids=@null +wktext +no_defs +over" buffer-size="256" base="/Users/mapsam/mapbox/tilelive-bridge/" maximum-extent="-20037508.34,-20037508.34,20037508.34,20037508.34">
  <Parameters>
    <Parameter name="bounds">-71.544323,42.834546,-71.534092,42.843722</Parameter>
    <Parameter name="center">-71.5392075,42.839134,0</Parameter>
    <Parameter name="format">pbf</Parameter>
    <Parameter name="json">{&quot;vector_layers&quot;:[{&quot;id&quot;:&quot;test_case_works&quot;,&quot;description&quot;:&quot;&quot;,&quot;minzoom&quot;:0,&quot;maxzoom&quot;:22,&quot;fields&quot;:{}}]}</Parameter>
    <Parameter name="maxzoom">15</Parameter>
    <Parameter name="minzoom">0</Parameter>
  </Parameters>
  <Layer name="test_case_works" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs" buffer-size="8">
    <Datasource>
      <Parameter name="cache_features">false</Parameter>
      <Parameter name="file">/Users/mapsam/data/unpacker-failures/bug_example/test_case_works.geojson</Parameter>
      <Parameter name="layer">test_case_works</Parameter>
      <Parameter name="type">geojson</Parameter>
    </Datasource>
  </Layer>
</Map>

Pyramid (generated in tilelive with XML and spherical mercator)

{ 
  '0': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
  '1': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
  '2': { minX: 1, minY: 1, maxX: 1, maxY: 1 },
  '3': { minX: 2, minY: 2, maxX: 2, maxY: 2 },
  '4': { minX: 4, minY: 5, maxX: 4, maxY: 5 },
  '5': { minX: 9, minY: 11, maxX: 9, maxY: 11 },
  '6': { minX: 19, minY: 23, maxX: 19, maxY: 23 },
  '7': { minX: 38, minY: 47, maxX: 38, maxY: 47 },
  '8': { minX: 77, minY: 94, maxX: 77, maxY: 94 },
  '9': { minX: 154, minY: 188, maxX: 154, maxY: 188 },
  '10': { minX: 308, minY: 376, maxX: 308, maxY: 376 },
  '11': { minX: 616, minY: 753, maxX: 617, maxY: 753 },
  '12': { minX: 1233, minY: 1507, maxX: 1234, maxY: 1507 },
  '13': { minX: 2467, minY: 3015, maxX: 2468, maxY: 3015 },
  '14': { minX: 4935, minY: 6030, maxX: 4936, maxY: 6030 },
  '15': { minX: 9871, minY: 12060, maxX: 9872, maxY: 12061 } 
}

Per tile analysis

>>>>>  test_case_fails
0/0/0 (features: 1) (painted: true) (empty: false)
1/0/0 (features: 0) (painted: false) (empty: true)
2/1/1 (features: 1) (painted: true) (empty: false)
3/2/2 (features: 1) (painted: true) (empty: false)
4/4/5 (features: 3) (painted: true) (empty: false)
5/9/11 (features: 4) (painted: true) (empty: false)
6/19/23 (features: 4) (painted: true) (empty: false)
7/38/47 (features: 4) (painted: true) (empty: false)
8/77/94 (features: 4) (painted: true) (empty: false)
9/154/188 (features: 4) (painted: true) (empty: false)
10/308/376 (features: 4) (painted: true) (empty: false)
11/616/753 (features: 4) (painted: true) (empty: false)
11/617/753 (features: 4) (painted: true) (empty: false)
12/1233/1507 (features: 3) (painted: true) (empty: false)
12/1234/1507 (features: 4) (painted: true) (empty: false)
13/2467/3014 (features: 2) (painted: true) (empty: false)
13/2467/3015 (features: 3) (painted: true) (empty: false)
13/2468/3014 (features: 2) (painted: true) (empty: false)
13/2468/3015 (features: 4) (painted: true) (empty: false)
total tiles:  19

>>>>>  test_case_works
0/0/0 (features: 0) (painted: false) (empty: true)
1/0/0 (features: 0) (painted: false) (empty: true)
2/1/1 (features: 1) (painted: true) (empty: false)
3/2/2 (features: 1) (painted: true) (empty: false)
4/4/5 (features: 2) (painted: true) (empty: false)
5/9/11 (features: 3) (painted: true) (empty: false)
6/19/23 (features: 3) (painted: true) (empty: false)
7/38/47 (features: 3) (painted: true) (empty: false)
8/77/94 (features: 3) (painted: true) (empty: false)
9/154/188 (features: 3) (painted: true) (empty: false)
10/308/376 (features: 3) (painted: true) (empty: false)
11/616/753 (features: 3) (painted: true) (empty: false)
11/617/753 (features: 3) (painted: true) (empty: false)
12/1233/1507 (features: 2) (painted: true) (empty: false)
12/1234/1507 (features: 3) (painted: true) (empty: false)
13/2467/3015 (features: 2) (painted: true) (empty: false)
13/2468/3015 (features: 3) (painted: true) (empty: false)
14/4935/6030 (features: 2) (painted: true) (empty: false)
14/4936/6030 (features: 3) (painted: true) (empty: false)
15/9871/12060 (features: 2) (painted: true) (empty: false)
15/9871/12061 (features: 1) (painted: true) (empty: false)
15/9872/12060 (features: 3) (painted: true) (empty: false)
15/9872/12061 (features: 1) (painted: true) (empty: false)
total tiles:  23
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failure.geojson
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script.js
var mapnik = require('mapnik');
var fs = require('fs');
mapnik.register_default_input_plugins();
var testcases = [
{
"file": "test_case_fails",
"pyramid": {
'0': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
'1': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
'2': { minX: 1, minY: 1, maxX: 1, maxY: 1 },
'3': { minX: 2, minY: 2, maxX: 2, maxY: 2 },
'4': { minX: 4, minY: 5, maxX: 4, maxY: 5 },
'5': { minX: 9, minY: 11, maxX: 9, maxY: 11 },
'6': { minX: 19, minY: 23, maxX: 19, maxY: 23 },
'7': { minX: 38, minY: 47, maxX: 38, maxY: 47 },
'8': { minX: 77, minY: 94, maxX: 77, maxY: 94 },
'9': { minX: 154, minY: 188, maxX: 154, maxY: 188 },
'10': { minX: 308, minY: 376, maxX: 308, maxY: 376 },
'11': { minX: 616, minY: 753, maxX: 617, maxY: 753 },
'12': { minX: 1233, minY: 1507, maxX: 1234, maxY: 1507 },
'13': { minX: 2467, minY: 3014, maxX: 2468, maxY: 3015 }
}
},
{
"file": "test_case_works",
"pyramid": {
'0': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
'1': { minX: 0, minY: 0, maxX: 0, maxY: 0 },
'2': { minX: 1, minY: 1, maxX: 1, maxY: 1 },
'3': { minX: 2, minY: 2, maxX: 2, maxY: 2 },
'4': { minX: 4, minY: 5, maxX: 4, maxY: 5 },
'5': { minX: 9, minY: 11, maxX: 9, maxY: 11 },
'6': { minX: 19, minY: 23, maxX: 19, maxY: 23 },
'7': { minX: 38, minY: 47, maxX: 38, maxY: 47 },
'8': { minX: 77, minY: 94, maxX: 77, maxY: 94 },
'9': { minX: 154, minY: 188, maxX: 154, maxY: 188 },
'10': { minX: 308, minY: 376, maxX: 308, maxY: 376 },
'11': { minX: 616, minY: 753, maxX: 617, maxY: 753 },
'12': { minX: 1233, minY: 1507, maxX: 1234, maxY: 1507 },
'13': { minX: 2467, minY: 3015, maxX: 2468, maxY: 3015 },
'14': { minX: 4935, minY: 6030, maxX: 4936, maxY: 6030 },
'15': { minX: 9871, minY: 12060, maxX: 9872, maxY: 12061 }
}
}
];
testcases.forEach(function(f) {
var gj = JSON.parse(fs.readFileSync('../' + f.file + '.geojson'));
console.log('\n>>>>> ', f.file);
tileThemAll(f.file, gj, f.pyramid);
});
function tileThemAll(name, geojson, pyramid) {
var totalTiles = 0;
for (var z in pyramid) {
for (var x = pyramid[z].minX; x <= pyramid[z].maxX; x++) {
for (var y = pyramid[z].minY; y <= pyramid[z].maxY; y++) {
totalTiles++;
// this is where it all happens
var vt = new mapnik.VectorTile(+z, +x, +y);
vt.addGeoJSON(JSON.stringify(geojson), name);
var vtgj = JSON.parse(vt.toGeoJSONSync('__all__'));
console.log(z + '/' + x + '/' + y, '(features:', vtgj.features.length + ') (painted:', vt.painted() + ')', '(empty:', vt.empty() + ')');
}
}
}
console.log('total tiles: ', totalTiles);
}
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success.geojson
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