ATCO Electric DER siting shortlist

arazzo: 1.0.1
info:
  title: ATCO Electric DER siting shortlist
  version: 1.0.0
  summary: >-
    Go from ATCO Electric's whole Alberta distribution grid to a small, mapped shortlist of the
    feeder segments with the most DER hosting capacity, without ever pulling all 880,623 features.
  description: >-
    A native workflow over ATCO Electric's public hosting capacity feature service. It records the
    data vintage, ranks the 135 substations by peak capacity using server-side statistics, picks
    the best feeder in the chosen substation, sizes the result, then pulls only the surviving
    segments as WGS84 GeoJSON. Every step is an anonymous read — no key, token or signup. Written
    against openapi/atco-electric-hosting-capacity-openapi.yml; every operationId below exists
    verbatim in that spec.
sourceDescriptions:
- name: queryApi
  url: ../openapi/atco-query-api-openapi.yml
  type: openapi
- name: serviceApi
  url: ../openapi/atco-service-api-openapi.yml
  type: openapi
workflows:
- workflowId: der-siting-shortlist
  summary: Rank substations by DER hosting capacity and export a GeoJSON shortlist
  description: >-
    Inputs default to a whole-grid scan. Narrow `substation` once step 2 has told you which
    substations lead, and raise `minCapacityKw` to match ATCO's own top map class break (15,000 kW).
  inputs:
    type: object
    properties:
      substation:
        type: string
        description: SUB_NAME to drill into. Leave empty on the first pass and fill it from step 2.
        default: BONNYVILLE
      minCapacityKw:
        type: number
        description: Minimum DER_CAP_KW for a segment to make the shortlist.
        default: 15000
      pageSize:
        type: integer
        description: Features per page. maxRecordCount is 1000 with geometry.
        default: 1000
  steps:
  - stepId: record-vintage
    description: >-
      Capture the layer's edit timestamps. There is no changelog for this API, so
      editingInfo.dataLastEditDate is the only provenance a downstream report can cite.
    operationId: getHostingCapacityLayerInfo
    parameters:
    - name: f
      in: query
      value: json
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.editingInfo.dataLastEditDate != null
    outputs:
      dataLastEditDate: $response.body#/editingInfo/dataLastEditDate
      maxRecordCount: $response.body#/maxRecordCount
  - stepId: rank-substations
    description: >-
      One request summarizes the entire grid — max, average and segment count per substation,
      ordered by peak capacity. 135 rows instead of 880,623 features.
    operationId: queryHostingCapacity
    parameters:
    - name: where
      in: query
      value: 1=1
    - name: groupByFieldsForStatistics
      in: query
      value: SUB_NAME
    - name: outStatistics
      in: query
      value: '[{"statisticType":"max","onStatisticField":"DER_CAP_KW","outStatisticFieldName":"max_kw"},{"statisticType":"avg","onStatisticField":"DER_CAP_KW","outStatisticFieldName":"avg_kw"},{"statisticType":"count","onStatisticField":"OBJECTID","outStatisticFieldName":"segments"}]'
    - name: orderByFields
      in: query
      value: max_kw DESC
    - name: returnGeometry
      in: query
      value: false
    - name: f
      in: query
      value: json
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.error == null
      type: jsonpath
    outputs:
      rankedSubstations: $response.body#/features
  - stepId: top-feeder-per-circuit
    description: >-
      Within the chosen substation, return the single highest-capacity segment on each feeder.
      Note that queryTopFeatures requires BOTH topFilter and where — omitting where returns
      "No where clause specified." with HTTP 200.
    operationId: queryTopHostingCapacityFeatures
    parameters:
    - name: where
      in: query
      value: "SUB_NAME='{$inputs.substation}'"
    - name: topFilter
      in: query
      value: '{"groupByFields":"FEEDER","topCount":1,"orderByFields":"DER_CAP_KW DESC"}'
    - name: outFields
      in: query
      value: SUB_NAME,SUB_NUM,FEEDER,PHASE,DER_CAP_KW
    - name: returnGeometry
      in: query
      value: false
    - name: f
      in: query
      value: json
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      topFeeders: $response.body#/features
  - stepId: size-the-shortlist
    description: >-
      Count before fetching. A single substation can hold tens of thousands of segments — the
      BONNYVILLE substation returned 34,009 on 2026-07-27.
    operationId: queryHostingCapacityByPost
    requestBody:
      contentType: application/x-www-form-urlencoded
      payload:
        where: "SUB_NAME='{$inputs.substation}'"
        returnCountOnly: true
        f: json
    successCriteria:
    - condition: $statusCode == 200
    - context: $response.body
      condition: $.count != null
      type: jsonpath
    outputs:
      shortlistCount: $response.body#/count
  - stepId: export-shortlist-geojson
    description: >-
      Pull only the qualifying segments, reprojected to WGS84 so the output drops straight into a
      web map. Page on properties.exceededTransferLimit, ordering by OBJECTID for stable paging.
    operationId: queryHostingCapacity
    parameters:
    - name: where
      in: query
      value: "SUB_NAME='{$inputs.substation}' AND DER_CAP_KW > {$inputs.minCapacityKw}"
    - name: outFields
      in: query
      value: OBJECTID,SUB_NAME,SUB_NUM,FEEDER,PHASE,DER_CAP_KW,DATELOADED
    - name: returnGeometry
      in: query
      value: true
    - name: outSR
      in: query
      value: '4326'
    - name: orderByFields
      in: query
      value: OBJECTID
    - name: resultOffset
      in: query
      value: '0'
    - name: resultRecordCount
      in: query
      value: $inputs.pageSize
    - name: f
      in: query
      value: geojson
    successCriteria:
    - condition: $statusCode == 200
    outputs:
      shortlist: $response.body#/features
      morePages: $response.body#/properties/exceededTransferLimit
  outputs:
    dataLastEditDate: $steps.record-vintage.outputs.dataLastEditDate
    rankedSubstations: $steps.rank-substations.outputs.rankedSubstations
    topFeeders: $steps.top-feeder-per-circuit.outputs.topFeeders
    shortlistCount: $steps.size-the-shortlist.outputs.shortlistCount
    shortlist: $steps.export-shortlist-geojson.outputs.shortlist
    morePages: $steps.export-shortlist-geojson.outputs.morePages