arcgis api for javascript analyzing vector tile performance...performance :: looking at both ends of...
Post on 07-Jul-2020
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Hannes Fleischer
ArcGIS API for JavaScript Analyzing Vector Tile Performance
Agenda
• Basics :: tile types
• Performance :: looking at both ends of the spectrum
• Analysis :: measuring and visualizing data quality- Vector Tile Decoder- Visualization- Demo
• Data Quality :: reduce vertices and features- Tool suggestions- Demo
Basics :: tile types
• Raster Tiles- Tiled portions of map- Style permanently applied to data- Fixed tiling scheme - Tile size determined by
- File format- Compression- Data quality- Style quality
• Vector Tiles- Tiled portions of data- Style separated from data- Adaptive or fixed tiling scheme- Tile size determined by
- Data quality
Basics :: tile types
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- Tile size determined by- Data quality
Performance :: fast and crisp
• Vector Tiles smaller than 100kB and/or 10000 vertices- load fast (<50ms)- render fast- higher detail LOD’s become available fast enough to replace low detail LOD’s
Performance :: on the heavy side
• Vector Tiles larger than 1000kB and/or 100000 vertices- may load slow, (> 250ms)- may have noticeable rendering time- higher detail LODs may take long to show, thus exposing low detail LOD content
Analysis :: measuring and visualizing data quality
• Vector Tile reader- Tile anatomy- Service structure- Tile decoder
• Data Visualization- Tile payload charting
• Map Visualization- Feature highlights- Vertex density
Analysis :: vector tile coordinates
• Vector Tile Grid- Fixed numbers zero to grid extent- Mapped to geo space by tiling scheme
• Tile size is 512px, default grid size is 4096
• Default grid resolutions- Lod 09 / 1:577790: 19.11m- Lod 06 / 1:361112: 1.19m- …
2 / 2
6 / -1
5 / 7
-12 / 4
0 / 0
15 / 15
Analysis :: vector tile index
• Tiles are split until vertex countis below maximum vertex count
• Tiles at certain LODs may containa high number of vertices
• The last tile in its stack has a largergrid size so overzooming doesnot expose artifacts
Analysis :: vector tile service structure
├─── esriinfo metadata└─── p12
├─── resources│ ├─── fonts more pbfs, "sdf" encoded glyphs│ ├─── info directory info│ ├─── sprites multi resolution sprites│ └─── styles rendering directives├─── tile tiles, bundled or exploded├─── tilemap index└─── root.json service info
Analysis :: vector tile decoder
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Analysis :: vector tile decoder
1: 000110102: 001100113: 000010104: 000001105: 011011006: 011011117: 011001008: 010111119: 0011000110: 0011000011: 0001001012: 0001100113: 0001100014: 0000000115: 0010001016: 0001010117: 0010000118: 1100111019: 1111100020: 0000001021: 1010100022: 1001010123: 0001000124: 1000000025: 10000000
Analysis :: vector tile decoder
1: 00011010 ───> 3 2: 00110011 3: 00001010 4: 00000110 5: 01101100 6: 01101111 7: 01100100 8: 01011111 9: 00110001 10: 00110000 11: 00010010 12: 00011001 13: 00011000 14: 00000001 15: 00100010 16: 00010101 17: 00100001 18: 11001110 19: 11111000 20: 00000010 21: 10101000 22: 10010101 23: 00010001 24: 10000000 25: 10000000
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 2: 00110011 3: 00001010 4: 00000110 5: 01101100 6: 01101111 7: 01100100 8: 01011111 9: 00110001 10: 00110000 11: 00010010 12: 00011001 13: 00011000 14: 00000001 15: 00100010 16: 00010101 17: 00100001 18: 11001110 19: 11111000 20: 00000010 21: 10101000 22: 10010101 23: 00010001 24: 10000000 25: 10000000
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ───> layer <─── repeated Layer layers = 3; 2: 00110011 3: 00001010 4: 00000110 5: 01101100 6: 01101111 7: 01100100 8: 01011111 9: 00110001 10: 00110000 11: 00010010 12: 00011001 13: 00011000 14: 00000001 15: 00100010 16: 00010101 17: 00100001 18: 11001110 19: 11111000 20: 00000010 21: 10101000 22: 10010101 23: 00010001 24: 10000000 25: 10000000
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ─┬─> layer <─── repeated Layer layers = 3;2: 00110011 ───> 51 └─> length ───────┐3: 00001010 │ 4: 00000110 │5: 01101100 │6: 01101111 │7: 01100100 │8: 01011111 │9: 00110001 │10: 00110000 │ 11: 00010010 │12: 00011001 │13: 00011000 │14: 00000001 │15: 00100010 │16: 00010101 │17: 00100001 │18: 11001110 │ 19: 11111000 │ 20: 00000010 │ 21: 10101000 │ 22: 10010101 │ 23: 00010001 │24: 10000000 │25: 10000000 │
│
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ─┬─> layer <─── repeated Layer layers = 3; 2: 00110011 ───> 51 └─> length ───────┐3: 00001010 ───> 1/2 ─┬─> name │ <─── required string name = 1; 4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 │ │6: 01101111 │ │7: 01100100 │ │8: 01011111 │ │9: 00110001 │ │10: 00110000 <───────────────────────────┘ │ 11: 00010010 │12: 00011001 │13: 00011000 │14: 00000001 │15: 00100010 │16: 00010101 │17: 00100001 │18: 11001110 │ 19: 11111000 │ 20: 00000010 │ 21: 10101000 │ 22: 10010101 │ 23: 00010001 │24: 10000000 │25: 10000000 │
│
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ─┬─> layer <─── repeated Layer layers = 3; 2: 00110011 ───> 51 └─> length ───────┐3: 00001010 ───> 1/2 ─┬─> name │ <─── required string name = 1;4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 │12: 00011001 │13: 00011000 │14: 00000001 │15: 00100010 │16: 00010101 │17: 00100001 │18: 11001110 │ 19: 11111000 │ 20: 00000010 │ 21: 10101000 │ 22: 10010101 │ 23: 00010001 │24: 10000000 │25: 10000000 │
│
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ─┬─> layer <─── repeated Layer layers = 3; 2: 00110011 ───> 51 └─> length ───────┐3: 00001010 ───> 1/2 ─┬─> name │ <─── required string name = 1;4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 │ │14: 00000001 │ │15: 00100010 │ │16: 00010101 │ │17: 00100001 │ │18: 11001110 │ │ 19: 11111000 │ │ 20: 00000010 │ │ 21: 10101000 │ │ 22: 10010101 │ │ 23: 00010001 │ │24: 10000000 │ │25: 10000000 │ │
│ │
Analysis :: vector tile decoder
1: 00011010 ───> 3/2 ─┬─> layer <─── repeated Layer layers = 3; 2: 00110011 ───> 51 └─> length ───────┐3: 00001010 ───> 1/2 ─┬─> name │ <─── required string name = 1; 4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 │ │14: 00000001 │ │15: 00100010 │ │16: 00010101 │ │17: 00100001 │ │18: 11001110 │ │ 19: 11111000 │ │ 20: 00000010 │ │ 21: 10101000 │ │ 22: 10010101 │ │ 23: 00010001 │ │24: 10000000 │ │25: 10000000 │ │
│ │
Analysis :: vector tile decoder
10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 │ │14: 00000001 │ │15: 00100010 │ │16: 00010101 │ │17: 00100001 │ │18: 11001110 │ │ 19: 11111000 │ │ 20: 00000010 │ │ 21: 10101000 │ │ 22: 10010101 │ │ 23: 00010001 │ │24: 10000000 │ │25: 10000000 │ │26: 00010000 │ │27: 00000000 │ │28: 11111111 │ │29: 11111111 │ │30: 00001111 │ │31: 11111111 │ │32: 11111111 │ │33: 00001111 │ │34: 10000000 │ │35: 10000000 │ │36: 00010000 │ │37: 00000000 <─────────────────────────────┘ │38: 00011010 │39: 00001000 │40: 01011111 │41: 01101101 │
│
Analysis :: vector tile decoder
4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN]14: 00000001 ───> 1 └─> point │ │15: 00100010 │ │16: 00010101 │ │17: 00100001 │ │18: 11001110 │ │ 19: 11111000 │ │ 20: 00000010 │ │ 21: 10101000 │ │ 22: 10010101 │ │ 23: 00010001 │ │24: 10000000 │ │25: 10000000 │ │26: 00010000 │ │27: 00000000 │ │28: 11111111 │ │29: 11111111 │ │30: 00001111 │ │31: 11111111 │ │32: 11111111 │ │33: 00001111 │ │34: 10000000 │ │35: 10000000 │ │
│ │
Analysis :: vector tile decoder
4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN];14: 00000001 ───> 1 └─> point │ │15: 00100010 ───> 4/2 ─┬─> geometry │ │ <─── repeated uint32 geometry = 4 [packed = true];16: 00010101 ───> 21 └─> length ───┐ │ │17: 00100001 │ │ │18: 11001110 │ │ │ 19: 11111000 │ │ │ 20: 00000010 │ │ │ 21: 10101000 │ │ │ 22: 10010101 │ │ │ 23: 00010001 │ │ │24: 10000000 │ │ │25: 10000000 │ │ │26: 00010000 │ │ │27: 00000000 │ │ │28: 11111111 │ │ │29: 11111111 │ │ │30: 00001111 │ │ │31: 11111111 │ │ │32: 11111111 │ │ │33: 00001111 │ │ │34: 10000000 │ │ │35: 10000000 │ │ │
│ │ │
Analysis :: vector tile decoder
4: 00000110 ───> 6 └─> length ───┐ │5: 01101100 ───> l │ │6: 01101111 ───> o │ │7: 01100100 ───> d │ │8: 01011111 ───> _ │ │9: 00110001 ───> 1 │ │10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN]14: 00000001 ───> 1 └─> point │ │15: 00100010 ───> 4/2 ─┬─> geometry │ │ <─── repeated uint32 geometry = 4 [packed = true];16: 00010101 ───> 21 └─> length ───┐ │ │17: 00100001 ───> 4/1 ───> 4x moveto │ │ │18: 11001110 │ │ │ 19: 11111000 │ │ │ 20: 00000010 │ │ │ 21: 10101000 │ │ │ 22: 10010101 │ │ │ 23: 00010001 │ │ │24: 10000000 │ │ │25: 10000000 │ │ │26: 00010000 │ │ │27: 00000000 │ │ │28: 11111111 │ │ │29: 11111111 │ │ │30: 00001111 │ │ │31: 11111111 │ │ │32: 11111111 │ │ │33: 00001111 │ │ │34: 10000000 │ │ │35: 10000000 │ │ │
│ │ │
Analysis :: vector tile decoder
10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN]14: 00000001 ───> 1 └─> point │ │15: 00100010 ───> 4/2 ─┬─> geometry │ │ <─── repeated uint32 geometry = 4 [packed = true];16: 00010101 ───> 21 └─> length ───┐ │ │17: 00100001 ───> 4/1 ───> 4x moveto │ │ │18: 11001110 │ │ │ 19: 11111000 │ │ │ 20: 00000010 │ │ │ 21: 10101000 │ │ │ 22: 10010101 │ │ │ 23: 00010001 │ │ │24: 10000000 │ │ │25: 10000000 │ │ │26: 00010000 │ │ │27: 00000000 │ │ │28: 11111111 │ │ │29: 11111111 │ │ │30: 00001111 │ │ │31: 11111111 │ │ │32: 11111111 │ │ │33: 00001111 │ │ │34: 10000000 │ │ │35: 10000000 │ │ │36: 00010000 │ │ │37: 00000000 <───────────────────────────┴─┘ │38: 00011010 │39: 00001000 │40: 01011111 │41: 01101101 │
│
Analysis :: vector tile decoder
10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN]14: 00000001 ───> 1 └─> point │ │15: 00100010 ───> 4/2 ─┬─> geometry │ │ <─── repeated uint32 geometry = 4 [packed = true];16: 00010101 ───> 21 └─> length ───┐ │ │17: 00100001 ───> 4/1 ───> 4x moveto │ │ │18: 11001110 ─┐ │ │ │ 19: 11111000 │ │ │ │ 20: 00000010 └─> 24103 ───> x │ │ │ 21: 10101000 │ │ │ 22: 10010101 │ │ │ 23: 00010001 │ │ │24: 10000000 │ │ │25: 10000000 │ │ │26: 00010000 │ │ │27: 00000000 │ │ │28: 11111111 │ │ │29: 11111111 │ │ │30: 00001111 │ │ │31: 11111111 │ │ │32: 11111111 │ │ │33: 00001111 │ │ │34: 10000000 │ │ │35: 10000000 │ │ │36: 00010000 │ │ │37: 00000000 <───────────────────────────┴─┘ │38: 00011010 │39: 00001000 │40: 01011111 │41: 01101101 │
│
Analysis :: vector tile decoder
10: 00110000 ───> 0 <──────────────┘ │ 11: 00010010 ───> 2/2 ─┬─> feature │ <─── repeated Feature features = 2;12: 00011001 ───> 25 └─> length ─────┐ │13: 00011000 ───> 3/0 ─┬─> geom type │ │ <─── optional GeomType type = 3 [default = UNKNOWN]14: 00000001 ───> 1 └─> point │ │15: 00100010 ───> 4/2 ─┬─> geometry │ │ <─── repeated uint32 geometry = 4 [packed = true];16: 00010101 ───> 21 └─> length ───┐ │ │17: 00100001 ───> 4/1 ───> 4x moveto │ │ │18: 11001110 ─┐ │ │ │ 19: 11111000 │ │ │ │ 20: 00000010 └─> 24103 ───> x │ │ │ 21: 10101000 ─┐ │ │ │ 22: 10010101 │ │ │ │ 23: 00010001 └─> 140628 ───> y │ │ │24: 10000000 ─┐ │ │ │25: 10000000 │ │ │ │26: 00010000 └─> 131072 ───> x │ │ │27: 00000000 ───> 0 ───> y │ │ │28: 11111111 ─┐ │ │ │29: 11111111 │ │ │ │30: 00001111 └─> -131072 ───> x │ │ │31: 11111111 ─┐ │ │ │32: 11111111 │ │ │ │33: 00001111 └─> -131072 ───> y │ │ │34: 10000000 ─┐ │ │ │35: 10000000 │ │ │ │36: 00010000 └─> 131072 ───> x │ │ │37: 00000000 ───> 0 ───> y <───────┴─┘ │38: 00011010 │39: 00001000 │40: 01011111 │41: 01101101 │
│
Analysis :: vector tile decoder
26: 00010000 └─> 131072 ───> x │ │ │27: 00000000 ───> 0 ───> y │ │ │28: 11111111 ─┐ │ │ │29: 11111111 │ │ │ │30: 00001111 └─> -131072 ───> x │ │ │31: 11111111 ─┐ │ │ │32: 11111111 │ │ │ │33: 00001111 └─> -131072 ───> y │ │ │34: 10000000 ─┐ │ │ │35: 10000000 │ │ │ │36: 00010000 └─> 131072 ───> x │ │ │37: 00000000 ───> 0 ───> y <───────┴─┘ │38: 00011010 ───> 3/2 ─┬─> keys │ <─── repeated string keys = 3;39: 00001000 ───> 8 └─> length ───┐ │40: 01011111 │ │41: 01101101 │ │42: 01101001 │ │43: 01101110 │ │44: 01111010 │ │45: 01101111 │ │46: 01101111 │ │47: 01101101 <───────────────────────────┘ │48: 00101000 │49: 10000000 │ 50: 10000000 │ 51: 00010000 │ 52: 01111000 │ 53: 00000010 <───────────────────────────────┘
Analysis :: vector tile decoder
26: 00010000 └─> 131072 ───> x │ │ │27: 00000000 ───> 0 ───> y │ │ │28: 11111111 ─┐ │ │ │29: 11111111 │ │ │ │30: 00001111 └─> -131072 ───> x │ │ │31: 11111111 ─┐ │ │ │32: 11111111 │ │ │ │33: 00001111 └─> -131072 ───> y │ │ │34: 10000000 ─┐ │ │ │35: 10000000 │ │ │ │36: 00010000 └─> 131072 ───> x │ │ │37: 00000000 ───> 0 ───> y <───────┴─┘ │38: 00011010 ───> 3/2 ─┬─> keys │ <─── repeated string keys = 3;39: 00001000 ───> 8 └─> length ───┐ │40: 01011111 ───> _ │ │41: 01101101 ───> m │ │42: 01101001 ───> i │ │43: 01101110 ───> n │ │44: 01111010 ───> z │ │45: 01101111 ───> o │ │46: 01101111 ───> o │ │47: 01101101 ───> m <──────────────┘ │48: 00101000 │49: 10000000 │ 50: 10000000 │ 51: 00010000 │ 52: 01111000 │ 53: 00000010 <───────────────────────────────┘
Analysis :: vector tile decoder
26: 00010000 └─> 131072 ───> x │ │ │27: 00000000 ───> 0 ───> y │ │ │28: 11111111 ─┐ │ │ │29: 11111111 │ │ │ │30: 00001111 └─> -131072 ───> x │ │ │31: 11111111 ─┐ │ │ │32: 11111111 │ │ │ │33: 00001111 └─> -131072 ───> y │ │ │34: 10000000 ─┐ │ │ │35: 10000000 │ │ │ │36: 00010000 └─> 131072 ───> x │ │ │37: 00000000 ───> 0 ───> y <───────┴─┘ │38: 00011010 ───> 3/2 ─┬─> keys │ <─── repeated string keys = 3;39: 00001000 ───> 8 └─> length ───┐ │40: 01011111 ───> _ │ │41: 01101101 ───> m │ │42: 01101001 ───> i │ │43: 01101110 ───> n │ │44: 01111010 ───> z │ │45: 01101111 ───> o │ │46: 01101111 ───> o │ │47: 01101101 ───> m <──────────────┘ │48: 00101000 ───> 5/1 ───> extent │ <─── optional uint32 extent = 5 [default = 4096];49: 10000000 ─┐ │ 50: 10000000 │ │ 51: 00010000 └─> 262144 │ 52: 01111000 │ 53: 00000010 <───────────────────────────────┘
Analysis :: vector tile decoder
26: 00010000 └─> 131072 ───> x │ │ │27: 00000000 ───> 0 ───> y │ │ │28: 11111111 ─┐ │ │ │29: 11111111 │ │ │ │30: 00001111 └─> -131072 ───> x │ │ │31: 11111111 ─┐ │ │ │32: 11111111 │ │ │ │33: 00001111 └─> -131072 ───> y │ │ │34: 10000000 ─┐ │ │ │35: 10000000 │ │ │ │36: 00010000 └─> 131072 ───> x │ │ │37: 00000000 ───> 0 ───> y <───────┴─┘ │38: 00011010 ───> 3/2 ─┬─> keys │ <─── repeated string keys = 3;39: 00001000 ───> 8 └─> length ───┐ │40: 01011111 ───> _ │ │41: 01101101 ───> m │ │42: 01101001 ───> i │ │43: 01101110 ───> n │ │44: 01111010 ───> z │ │45: 01101111 ───> o │ │46: 01101111 ───> o │ │47: 01101101 ───> m <──────────────┘ │48: 00101000 ───> 5/1 ───> extent │ <─── optional uint32 extent = 5 [default = 4096];49: 10000000 ─┐ │ 50: 10000000 │ │ 51: 00010000 └─> 262144 │ 52: 01111000 ───> 15/1 ───> version │ <─── required uint32 version = 15 [default = 1]53: 00000010 ───> 2 <──────────────────┘
Analysis :: vector tile decoder
Analysis :: vector tile decoder (thank god I learned to code)
let vtileMsg: IDefinedMsg <VTile, VTileBuilder> = Types.define('vectortile', () => new VTileBuilder());vtileMsg.define('key___layer', 0x3, ID____LAYER, (b: VTileBuilder, v: Layer) => b.addLayer(v));
let layerMsg: IDefinedMsg<Layer, LayerBuilder> = Types.define('layer', () => new LayerBuilder());layerMsg.define('key____name', 0x1, ID___STRING, (b: LayerBuilder, v: string) => b.setName(v));layerMsg.define('key_feature', 0x2, ID__FEATURE, (b: LayerBuilder, v: Feature) => b.addFeature(v));layerMsg.define('key_____key', 0x3, ID___STRING, (b: LayerBuilder, v: string) => b.addKey(v));layerMsg.define('key___value', 0x4, ID____VALUE, (b: LayerBuilder, v: IVectorTileValue) => b.addValue(v));layerMsg.define('key__extent', 0x5, ID_VARINT32, (b: LayerBuilder, v: number) => b.setExtent(v));layerMsg.define('key_version', 0xF, ID_VARINT32, (b: LayerBuilder, v: number) => b.setVersion(v));
let featrMsg: IDefinedMsg <Feature, FeatureBuilder> = Types.define('feature', () => new FeatureBuilder());featrMsg.define('key____tags', 0x2, ID_PAKINT32, (b: FeatureBuilder, v: number[]) => b.setTags(v));featrMsg.define('key____type', 0x3, ID_____TYPE, (b: FeatureBuilder, v: any) => b.setGeomType(v));featrMsg.define('key___count', 0x4, ID____COUNT, (b: FeatureBuilder, v: number) => b.setCoordCount(v));
Demo
Data Quality :: eliminate polygon part
• Eliminate Parts that are too small to show- Be aware of pixel size- Optionally remove holes only
arcpy.EliminatePolygonPart_management(in_features,out_feature_class,{condition},{part_area},{part_area_percent},{part_option}
)
Data Quality :: simplify polygon
• Reduce polygon vertices- Be aware of pixel size
arcpy.SimplifyPolygon_cartography(in_features,out_feature_class,algorithm,tolerance,{minimum_area},{error_option},{collapsed_point_option},{in_barriers}
)
Data Quality :: intersect
• Self – intersect features- Be aware of pixel size- Places vertices along edges- Improves Vector Tile generalization
arcpy.Intersect_analysis(in_features,out_feature_class,{join_attributes},{cluster_tolerance},{output_type}
)
Data Quality :: repair geometry
• Sanitizes input
arcpy.RepairGeometry_management(in_features,{delete_null},{validation_method}
)
Data Quality :: dissolve
• Dissolve by unique renderer field set- Can significantly reduce attributive payload- Apply after geometry operations
arcpy.Dissolve_management(in_features,out_feature_class,{dissolve_field},{statistics_fields},{multi_part}, {unsplit_lines}
)
Data Quality
Demo
Analyzing Vector Tile Performance :: resources
• https://github.com/hfleischer/vector-tile-analysis
• https://docs.mapbox.com/vector-tiles/specification/
• https://developers.arcgis.com/javascript/
• https://pro.arcgis.com/de/pro-app/help/mapping/map-authoring/author-a-map-for-vector-tile-creation.htm
• https://woportal.mysynergis.com/BasemapAT/synserver?project=BasemapAT&client=flex
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