Sources: EIA control-area regions layer (ArcGIS)
``` [Full Screen Chart](../download_chart/CAISO/caiso_ba_map.html) ## Description Interactive map of every North American balancing authority territory (85 BAs incl. Canadian and Mexican interconnection members). Each territory is a pastel-filled region; hovering shows the BA name, code, annual net generation, and territory area. Larger BAs carry their code directly on the map; small municipal BAs are hover-only. The three hub BAs of this project (CAISO, PACE, PACW) carry larger labels. The legend lists every BA and toggles its region on and off. **Formulas Used:** N/A. **Data Cleaning Information:** Ring vertices are thinned with Douglas-Peucker (~1.2 km tolerance) at chart build time so canvas panning stays smooth; territories are drawn largest-first so embedded small BAs remain visible and hoverable. ## Notes - Polygons are EIA's control-area regions layer (2025-02 edition) - the successor to the retired HIFLD "Control Areas" layer that most public BA maps still render (2021 vintage). - BA territories are service-area approximations built from utility service territories, not electrical topology; footprints overlap, and nothing should be area-weighted against them. - Analytical plant-to-BA membership in this project comes from `eia860m_generators`, never from these polygons. ## Chart Specs | Chart Name | Balancing Authority Map | |------------------------|------------------------------------------------------------| | Chart ID | caiso_ba_map | | Topic Tags | Map, Balancing Authorities, Grid Context | | Data Series Start Date | | | Data Frequency | Reference snapshot | | Observation Period | | | Lag in Data Release | | | Data Release Timing | | | Seasonal Adjustment | | | Units | MWh, sq mi | | HTML Chart | [HTML](../download_chart/CAISO/caiso_ba_map.html) | ## Dataframe Manifest | Dataframe Name | US BA Boundaries | |--------------------------------|--------------------------------------------------------------------------------------| | Dataframe ID | [us_ba_boundaries](../dataframes/CAISO/us_ba_boundaries.md) | | Data Sources | EIA control-area regions layer (ArcGIS) | | Data Providers | U.S. Energy Information Administration/ArcGIS Online (hosting) | | Links to Providers | https://services5.arcgis.com/bsqU0jSPAuI04L89/arcgis/rest/services/Balancing_Authorities/FeatureServer/0 | | Topic Tags | Reference, Balancing Authorities, Map | | Type of Data Access | | | How is data pulled? | src/pulls/pull_us_ba_boundaries.py via the ArcGIS FeatureServer API | | Data available up to (min) | | | Data available up to (max) | | | Dataframe Path | data\opensource\us_ba_boundaries.parquet | **Linked Charts:** - [CAISO:caiso_ba_map](../../charts/CAISO.caiso_ba_map.md) ## Pipeline Manifest | Pipeline Name | Project-Lab-Energy-Weather-Natgas-Quanto-CAISO | |---------------------------------|--------------------------------------------------------| | Pipeline ID | [CAISO](../../index.md) | | Lead Pipeline Developer | Brian Nguyen | | Contributors | Brian Nguyen, Claire Kim | | Git Repo URL | | | Pipeline Web Page | Pipeline Web Page | | Date of Last Code Update | 2026-08-27 10:08:05 | | OS Compatibility | Windows, Linux, macOS | | Linked Dataframes | [CAISO:caiso_lmp_day_ahead_hourly](../dataframes/CAISO/caiso_lmp_day_ahead_hourly.md)