uid: lochmueller:blockly:gis
tags: []
props:
  parameters: []
  parameterGroups: []
timestamp: Jul 5, 2022, 5:31:16 PM
component: BlockLibrary
config:
  name: Geographic information system
slots:
  blocks:
    - component: BlockType
      config:
        args0:
          - check: GeoPosition
            name: POSITION1
            type: input_value
          - check: GeoPosition
            name: POSITION2
            type: input_value
        colour: 230
        helpUrl: ""
        inputsInline: false
        message0: Distance between %1 and %2
        output: Number
        tooltip: Return the distance between to GEO locations
        type: gis_distance
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:geo_distance}}({{input:POSITION1}}, {{input:POSITION2}})"
    - component: BlockType
      config:
        args0:
          - name: POSITION
            type: input_value
            check: GeoPosition
          - name: FORMAT
            options:
              - - hddd° mm′ ss.ss″
                - hdms
              - - hddd° mm.mmm′
                - hdm
              - - hddd.ddddd°
                - hdd
              - - ±ddd.ddddd°
                - d
            type: field_dropdown
        colour: 150
        helpUrl: ""
        inputsInline: true
        message0: Format %1 as %2
        output: String
        tooltip: Return position as formatted string. Check https://de.wikipedia.org/wiki/Geographische_Koordinaten
        type: gis_format_position
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:gis_format_position}}({{input:POSITION}}, '{{field:FORMAT}}')"
    - component: BlockType
      config:
        args0:
          - name: VALUE
            type: input_value
            check: Number
          - name: TO
            options:
              - - Inch
                - in
              - - Foot
                - ft
              - - Yard
                - yd
              - - Chain
                - ch
              - - Furlong
                - fur
              - - Mile
                - mi
              - - League
                - lea
            type: field_dropdown
        colour: 300
        helpUrl: ""
        inputsInline: true
        message0: Convert %1 meter to %2
        output: Number
        tooltip: Convert the meter into another unit
        type: gis_convert_from_meter
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:geo_convert_from_meter}}({{input:VALUE}}, '{{field:TO}}')"
    - component: BlockType
      config:
        args0:
          - name: VALUE
            type: input_value
            check: Number
          - name: UNIT
            options:
              - - Inch
                - in
              - - Foot
                - ft
              - - Yard
                - yd
              - - Chain
                - ch
              - - Furlong
                - fur
              - - Mile
                - mi
              - - League
                - lea
            type: field_dropdown
        colour: 230
        helpUrl: ""
        inputsInline: true
        message0: Convert %1 in unit %2 to meter
        output: Number
        tooltip: Convert the number into meter
        type: gis_convert_to_meter
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:geo_convert_to_meter}}({{input:VALUE}}, '{{field:UNIT}}')"
    - component: BlockType
      config:
        args0:
          - max: 90
            min: -90
            name: LATITUDE
            precision: 1e-7
            type: field_number
          - max: 180
            min: -180
            name: LONGITUDE
            precision: 1e-7
            type: field_number
        colour: 300
        helpUrl: ""
        inputsInline: true
        message0: Position at latitude %1 and longitude %2
        output: GeoPosition
        type: gis_position
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:geo_position}}({{field:LATITUDE}}, {{field:LONGITUDE}})"
    - component: BlockType
      config:
        args0:
          - name: LATITUDE
            type: input_value
          - name: LONGITUDE
            type: input_value
        colour: 300
        helpUrl: ""
        inputsInline: true
        message0: Position at latitude %1 and longitude %2
        output: GeoPosition
        type: gis_position_by_block
      slots:
        code:
          - component: BlockCodeTemplate
            config:
              template: "{{utility:geo_position}}({{input:LATITUDE}}, {{input:LONGITUDE}})"
  utilities:
    - component: UtilityFunction
      config:
        code: >-
          function geo_distance(position1, position2) {
            var lat1 = position1.latitude;
            var lat2 = position2.latitude;
            var lon1 = position1.longitude;
            var lon2 = position2.longitude;
            var R = 6371e3; // metres
            var o1 = lat1 * Math.PI/180;
            var o2 = lat2 * Math.PI/180;
            var Ao = (lat2-lat1) * Math.PI/180;
            var Ab = (lon2-lon1) * Math.PI/180;
            var a = Math.sin(Ao/2) * Math.sin(Ao/2) +
            Math.cos(o1) * Math.cos(o2) *
            Math.sin(Ab/2) * Math.sin(Ab/2);
            var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
            return R * c;
          }
        name: geo_distance
    - component: UtilityFunction
      config:
        code: >-
          function geo_position(latitude, longitude) { 
            return {'latitude': latitude, 'longitude': longitude};
          }
        name: geo_position
    - component: UtilityFunction
      config:
        code: >-
          function gis_format_position(position, format) { 
            switch(format) {
              case 'hdd':
                return 'todo';
              case 'hdm':
                return 'todo';
              case 'hdms':
                return 'todo';
              case 'd':
              default:
                return 'todo';
            }
          }
        name: gis_format_position
    - component: UtilityFunction
      config:
        code: >-
          function geo_convert_from_meter(value, to) {
            switch(to) {
              case 'in':
                return value * 39.3701;
              case 'ft':
                return value * 3.2808;
              case 'yd':
                return value * 1.09361;
              case 'ch':
                return value * 0.0497097;
              case 'fur':
                return value * 0.00497096;
              case 'mi':
                return value * 0.000621371;
              case 'lea':
                return value * 0.000179986;
            }
            return NaN;
          }
        name: geo_convert_from_meter
    - component: UtilityFunction
      config:
        code: >-
          function geo_convert_to_meter(value, from) {
            switch(from) {
              case 'in':
                return value / 39.3701;
              case 'ft':
                return value / 3.2808;
              case 'yd':
                return value / 1.09361;
              case 'ch':
                return value / 0.0497097;
              case 'fur':
                return value / 0.00497096;
              case 'mi':
                return value / 0.000621371;
              case 'lea':
                return value / 0.000179986;
            }
            return NaN;
          }
        name: geo_convert_to_meter