GIS Mapping

​​​​​​​​​​​​​​​​Geographical Information System (GIS) mapping uses spatial (geographical) data to create information-rich maps that benefit understanding, analysis, and decision-making. A GIS system allows multiple categories of data to be selected for representation on a map.

oil and gas well locations
Oil and gas wells south of Bakersfield

GIS mapping is useful for the Geologic Energy Management Division (CalGEM), industry operators, the public, and other users in various ways. For example, GIS aids in planning for spill management by mapping the locations of wells and associated facilities, other structures, and natural resources.

CalGEM also hosts several interactive maps to allow easy viewing and querying of its GIS data.​

GIS mapping helps CalGEM ​in its mission of ensuring public safety and environmental protection while advancing California's carbon-neutral and climate change objectives.

Interactive Maps

Well Finder: An Interactive map viewer that includes location of wells, fields, seeps, and notices and permits in California.​

​Data and Maps

CalGEM provides GIS data in downloadable shapefile (SHP) and tabular comma-separated value (CSV) formats. The division also hosts datasets as dynamic map services, indicated as REST links. Find descriptions, update details, and all relevant links below.

The "Readme" document contains definitions of well data elements.

Data Disclaimer

The well information and data represented on this site varies in accuracy, scale, origin, and completeness, and may be changed at any time without notice. While CalGEM makes every effort to provide accurate information, CalGEM makes no warranties as to the suitability of this product for any particular purpose. Any use of this information is at the user's own risk.


All Wells

This dataset provides oil and gas well locations and associated records covering the entire state published by CalGEM.

Updated daily

Coastal District Wells

This dataset provides oil and gas well locations and associated records published by CalGEM. The dataset covers the CalGEM Coastal District.

Updated daily

Inland District Wells

This dataset provides oil and gas well locations and associated records published by CalGEM. The dataset covers the CalGEM Inland District.

Updated daily

Northern District Wells

This dataset provides oil and gas well locations and associated records published by CalGEM. The dataset covers the CalGEM Northern District.

Updated daily

Southern District Wells

This dataset provides oil and gas well locations and associated records published by CalGEM. The dataset covers the CalGEM Southern District.

Updated daily

District Boundaries

This dataset provides CalGEM district boundaries. This depicts the CalGEM four-district structure, and supersedes the prior six-district structure.

Updated 1/29/2020

Facility Boundaries

This dataset provides oil and gas production or injection operations facility boundaries published by CalGEM.

Updated 1/15/2020

Field Boundaries

This dataset provides boundaries and associated data for 516 oil and gas fields (productive limits) published by CalGEM.

Updated 3/6/2019

CalGEM PLSS

This dataset provides a Public Land Survey System (PLSS) showing Township, Range, and Section in the State of California. Bureau of Land Management (BLM) PLSS covers most of the dataset and derived data from the Department of Pesticide Regulation (DPR) PLSS and CalGEM. Projected sections (DGR) were appended to complete the dataset.

Updated 12/10/2018

Primacy Productive Limits

This dataset is a digital version of CalGEM publication California Oil And Gas Fields 1973 & 1974 Volumes I, II, & III. It depicts areas where oil or gas production occurred ("Productive Limits") as of 1973 and 1974 and are deemed exempt for injection per the Primacy Agreement between EPA and CalGEM.

Updated 4/2/2019

TR26 Onshore Seeps

This dataset is a digital version of CalGEM Publication No. TR26, Onshore Oil & Gas Seeps in California, originally published in 1980. TR26 is a report of the research by CalGEM (at the time, DOG) of naturally occurring oil and gas seeps, current and historical.

Updated 4/17/2017


Note: For information not found in these tables, please contact the appropriate district office directly.