Created
August 6, 2018 14:55
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Liberia Land Cover Composition Widget
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{ | |
"$schema": "https://vega.github.io/schema/vega/v4.0.json", | |
"width": 240, | |
"height": 240, | |
"padding": 2, | |
"title": { | |
"text": "Land Cover Composition", | |
"font": "Fira Sans", | |
"fontSize": 16, | |
"offset": 20, | |
"anchor": "middle" | |
}, | |
"data": [ | |
{ | |
"name": "histogram", | |
"format": { | |
"property": "histograms[0].counts" | |
}, | |
"url": "https://production-api.globalforestwatch.org/v1/arcgis-proxy/ImageServer/computeHistograms?server=gfw&service=image_services/analysis&pixelSize=100&renderingRule={\"rasterFunction\":\"Identity\",\"rasterFunctionArguments\":{\"Raster\":\"$567\"},\"outputPixelType\":\"U8\" }&geostore=5e044c11ec1580a92b1a1d16b1a30233", | |
"transform": [ | |
{ | |
"type": "identifier", | |
"as": "id" | |
} | |
] | |
}, | |
{ | |
"name": "table", | |
"values": [ | |
{ | |
"id": "1", | |
"label": "No Data", | |
"hex": "#000" | |
}, | |
{ | |
"id": "2", | |
"label": "Forest > 80%", | |
"hex": "#006100" | |
}, | |
{ | |
"id": "3", | |
"label": "Forest 30 - 80%", | |
"hex": "#458A40" | |
}, | |
{ | |
"id": "4", | |
"label": "Forest < 30%", | |
"hex": "#8FCC51" | |
}, | |
{ | |
"id": "5", | |
"label": "Mangrove Swamps", | |
"hex": "#8F73E8" | |
}, | |
{ | |
"id": "6", | |
"label": "Settlements", | |
"hex": "#FF5454" | |
}, | |
{ | |
"id": "7", | |
"label": "Surface Water Bodies", | |
"hex": "#82BDF8" | |
}, | |
{ | |
"id": "8", | |
"label": "Grassland", | |
"hex": "#FAF887" | |
}, | |
{ | |
"id": "9", | |
"label": "Shrub", | |
"hex": "#FFC533" | |
}, | |
{ | |
"id": "10", | |
"label": "Bare Soil", | |
"hex": "#DEC7AB" | |
}, | |
{ | |
"id": "11", | |
"label": "Ecosystem Complex (rock/ sand)", | |
"hex": "#A6A6A6" | |
}, | |
{ | |
"id": "12", | |
"label": "Clouds", | |
"hex": "#4C4C4C" | |
} | |
], | |
"transform": [ | |
{ | |
"type": "lookup", | |
"from": "histogram", | |
"key": "id", | |
"fields": [ | |
"id" | |
], | |
"values": [ | |
"data" | |
], | |
"as": [ | |
"value" | |
] | |
}, | |
{ | |
"type": "filter", | |
"expr": "datum.value > 0" | |
}, | |
{ | |
"type": "pie", | |
"field": "value" | |
} | |
] | |
} | |
], | |
"scales": [ | |
{ | |
"name": "y", | |
"type": "band", | |
"range": "height", | |
"padding": 0.15, | |
"domain": { | |
"data": "table", | |
"field": "group" | |
} | |
}, | |
{ | |
"name": "x", | |
"type": "linear", | |
"range": "width", | |
"nice": true, | |
"zero": true, | |
"domain": { | |
"data": "table", | |
"field": "y1" | |
} | |
}, | |
{ | |
"name": "color", | |
"type": "ordinal", | |
"domain": { | |
"data": "table", | |
"field": "label" | |
}, | |
"range": { | |
"data": "table", | |
"field": "hex" | |
} | |
}, | |
{ | |
"name": "colorStroke", | |
"type": "ordinal", | |
"domain": { | |
"data": "table", | |
"field": "label" | |
}, | |
"range": [ | |
"#FFF" | |
] | |
} | |
], | |
"marks": [ | |
{ | |
"type": "arc", | |
"from": { | |
"data": "table" | |
}, | |
"encode": { | |
"enter": { | |
"fill": { | |
"scale": "color", | |
"field": "label" | |
}, | |
"tooltip": { | |
"signal": "datum.label + ': ' + format(datum.value, ',') + ' ha'" | |
}, | |
"x": { | |
"signal": "width / 2" | |
}, | |
"y": { | |
"signal": "height / 2" | |
}, | |
"startAngle": { | |
"field": "startAngle" | |
}, | |
"endAngle": { | |
"field": "endAngle" | |
}, | |
"padAngle": { | |
"value": 0 | |
}, | |
"innerRadius": { | |
"value": 0 | |
}, | |
"outerRadius": { | |
"signal": "width / 2" | |
}, | |
"cornerRadius": { | |
"value": 0 | |
}, | |
"sort": true | |
} | |
} | |
} | |
], | |
"legends": [ | |
{ | |
"fill": "color", | |
"orient": "bottom", | |
"direction": "horizontal", | |
"titleFontSize": 14, | |
"labelFontSize": 12, | |
"font": "Fira Sans", | |
"titleLimit": 240, | |
"columns": 2, | |
"rowPadding": 2, | |
"columnPadding": 10 | |
} | |
] | |
} |
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