aaronpdennis

aaronpdennis

Extract data from ESRI REST endpoint to GeoJSON (on Windows)

1. Find ESRI FeatureServer or MapServer

• example ESRI web map: Birmingham, AL
• open developer tools Ctrl+Shift+ i
• under "Network" tab, watch for objects with URLs that include arcgis/rest/services
• follow those URLS, and navigate back to the "Services Directory" (ex: https://gisweb.birminghamal.gov/arcgis/rest/services/)
• then navigate to the FeatureServer or MapServer layer (ex: https://gisweb.birminghamal.gov/arcgis/rest/services/CouncilDistrict/MapServer/0)
• this is the FeatureServer or MapServer endpoint we'll use. it should end in a number.

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if (data[0] >= 1) {
  context.fillStyle = '#45bae8';
}

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canvas
  .pngStream()
  .pipe(fs.createWriteStream('map_' + name + '.png'));

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function framedProjection(feature, mapWidth, mapHeight) {
  var projection = d3.geoAlbers();

  var centroid = d3.geoCentroid(feature);

  projection.rotate([-1 * centroid[0]]).scale(1).translate([0, 0]);

  var path = d3.geoPath().projection(projection);

  var bounds = path.bounds(feature);

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{
  "water_source": {
    "class": {
      "water well": ["man_made=water_well"],
      "water tower": ["man_made=water_tower"],
      "water tank": ["man_made=storage_tank", "man_made=water_tank"],
      "spring": ["natural=spring"],
      "drinking water": ["amenity=drinking_water"]
    },
    "potable": {

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license: gpl-3.0

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https://www.codementor.io/devops/tutorial/getting-started-postgresql-server-mac-osx

Installation (macOs)

Use Homebrew to install Postgres and PostGIS. If Homebrew is not installed, run:

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

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function shp2geojson() {
  ogr2ogr -f GeoJSON -s_srs EPSG:4269 -t_srs EPSG:4326 "../../$1.geojson" "$1.shp"
}

for i in ./*/*.zip; do
  directory=${i%*.zip}
  mkdir "$directory"
  cd "$directory"
  filename=${directory##*/}
  unzip "../${filename}.zip"

aaronpdennis