geoMapper - for Geologists app for iPhone and iPad

+Access the base map of a prospect directly from your phone
+Leverage GPS to seamlessly capture line and point data
+Auto-generate polylines to map your data points
+Define ideas-driven search patterns on the map
+Capture pictures of strata and outcrops and annotate them on-field
+Work even in the areas of no cellular connectivity
+Make systematic observations by recording field data in one place
+Plan your field camp schedule based on history of field notes

Designed and developed to make surface mapping faster and intuitive for field geologists.

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Note: "Continued use of GPS running in the background can dramatically decrease battery life."