Avenza Maps

Avenza Maps is a free mobile mapping app that allows you to download and use Louisiana Geological Survey maps directly on your smartphone or tablet. With georeferenced maps and built-in GPS, you can see your exact location on detailed geological maps—even without cell service. Acces our collection of georeference maps for both Android and iOS.

Avenza Maps Logo

Key Features:

  • Offline Access - Work in remote areas without connectivity
  • Real-Time GPS - See your location on geologic maps
  • Data Collection - Add field notes, photos, and measurements
  • Professional Accuracy - Georeferenced survey-grade maps

Available LGS Maps

  • Geologic Quadrangle Maps - 7.5-minute USGS quadrangles
  • Surface Geology Maps - Parish-level and regional surface geology
  • Geologic Hazard Maps - Subsidence, fault zones, coastal erosion
  • Historic Maps - Legacy surveys and specialized studies

Data Collection & Export

Collect field data directly on your maps:

  • Add placemarks with notes and photos
  • Draw lines for transects or contacts
  • Create polygons for mapped units
  • Export as KML, GPX, or CSV for GIS analysis

Compatible with ArcGIS, QGIS, and other GIS software.

Field Work & Research Applications

  • Geologic Field Mapping - Navigate to outcrops, mark sampling sites, document observations
  • Environmental Assessments - Reference subsurface geology and hazard zones
  • Academic Research - Access authoritative data for thesis work and field courses
  • Industry Applications - Support for oil and gas, consulting, and engineering projects
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