GIS (Geographic Information Systems)
What is GIS?
A Geographic Information System (GIS) integrates hardware, software, and data for capturing, managing, analyzing, and displaying all forms of geographically referenced information. GIS allows us to view, understand, question, interpret, and visualize data in many ways that reveal relationships, patterns, and trends in the form of maps, globes, reports, and charts. GIS helps you answer questions and solve problems by looking at your data in a way that is quickly understood and easily shared.
If you would like to learn more about GIS, please visit the ESRI website.
How Does Mariposa County Use GIS?
The GIS Division of the Planning Department utilizes numerous data sources in order to support the needs of other county departments, partnering agencies/organizations, and citizens. The collection, management, and presentation of geographic data assists in parcel, tax, and land records, disaster response -- like in the case of wildfires and floods --, planning of public recreation areas, and much more.
Mariposa GIS hosts it's publicly available data and resources on it's own ArcGIS Hub Site. Here, you can find data related to:
- Parcels and other boundaries
- The history of the county
- Voting and election maps
- Public Information
This Hub Site also allows you to download PDFs of numerous maps that Mariposa GIS has published. If you aren't able to find the data you are looking for, you can use the Data Request Form to let us know how we can help you with your geospatial data needs.
Contact Information & Data Requests
Please email questions to or call the Mariposa County Planning Department at 209-966-5151.
Visit the Mariposa County ArcGIS Online Homepage to explore active county GIS resources and data.
Recent Projects & Maps
- Public Information Map -- best used to check for road closures, active fires, evacuation zones, and power outages
- Mariposa County Historical Sites Interactive Map Tour -- guide your own tour around Mariposa County
- Public GIS Viewer -- contains all publicly available information layers
- 23 Years of Fire History -- explore notable fires that have occurred in and around Mariposa County since 2000
- Parcel Information
- Elections Webmap