USAtlas Geology 4+

Geobyte Europe S.L

Designed for iPad

    • 1.9 • 17 Ratings
    • $4.99



US GEOLOGY is one of the twelve chapters of The National Atlas of the United States® which was coordinated and lead by USGS, this is the effort of more than 20 Federal agencies. The other layers are, Agriculture, Biology, Boundaries, Climate, Environment, Government, History, Map Reference, People, Transportation and Water. Geobyte is planning to produce these Chapters in future.

In this volume we have incorporated 46 layers of vector information available at The National Atlas of the United States® Website. These include Earthquakes, Volcanoes, Geologic Map, Mineral Operation, Magnetic Field, Waterways, County Boundaries and many more.

Detailed Geologic Maps (scale of 1:500,000 or larger) and Faults, from Open-File Reports of USGS of 48 States are also included.

The Legend or Key for each layer has been designed in the way that one can select all or select specific units from the legend and generate the map of particular interest. For example you can generate map with only Cretaceous Sedimentary rocks and only earthquakes of certain magnitude.

The units on the map can be identified by long tap on the map.

With the GPS capability of the system the location on the ground is known and you can add, edit and save notes on the map.The distance between two points and the area of polygon can also be calculated.

All the layers can be displayed in both Mercator and Lambert Equal-Area Projections.

There is no need to have access to WIFI, 3G or 4G Data Network to use this app. All the data are saved in your device.

The National Atlas of the United States®, is the registered trademark of the United States Department of the Interior

The layers included are:

Coal Fields
Continental Divide
Elevation Contours
Geologic Map
Geologic Map – Calderas
Geologic Map – Faults
Geologic Map – Impact Sites
Geologic Map – Metamorphic Areas
Geologic Map – 1:500 k State by State
Geologic Map – Faults 1:500 k
Glacial Limits
Karst – Engineering Aspects
Karst – Subsidence
Landslide – Incidence and Susceptibility
Landslide – Costly Events
Landslide – Costly Regional Events
Magnetic Field - Declination, 1 degree increments
Magnetic Field - Declination Secular Variation, arc mins/yr
Magnetic Field – Horizontal Intensity, 500 nanoTesla increments
Magnetic Field – Horizontal Intensity Secular Variation, nano Tesla/yr
Magnetic Filed – Inclination, 1 degree increments
Magnetic Field – Inclination Secular Variation, arc mins/yr
Magnetic Field – Total Field Intensity, 500 nanoTesla Increments
Magnetic Field – Total Field Intensity Secular variation, nano Tesla/yr
Magnetic Field – Vertical Intensity, 500 nanoTesla Increments
Magnetic Field – Vertical Intensity Secular Variation, nanoTesla/yr
Mineral Operations – Agricultural Minerals
Mineral Operations – Construction Minerals
Mineral Operations – Ferrous Mines
Mineral Operations – Ferrous Processing Plants
Mineral Operations – Miscellaneous Industrial Operations
Mineral Operations – Nonferrous Mines
Mineral Operations – Nonferrous Processing Plants
Mineral Operations – Refractory, Abrasive and Other Industrial Operations
Mineral Operation – Sand and Gravel Operations
Mineral Operations – Stone, Crushed
Quaternary Faults
Seismic Hazard – Peak Acceleration
Surficial Deposits (Eastern & Central States)
State Boundaries
County Boundaries
Main Roads (inc Ferries)
Latitude and Longitude

What’s New

Version 2.1

This app has been updated by Apple to display the Apple Watch app icon.

Updates to interface.

Ratings and Reviews

1.9 out of 5
17 Ratings

17 Ratings

Eriptron ,

Agreed, not ready for prime time

Zoom is awful! Takes three, four or more tries. Uses non-intuitive map controls. Moving map is jerky. I spent so much time fighting the user interface I finally decided it's not worth the frustration. I think the developer must be posting the good reviews.

Ex. The map navigation on my iPad Air 1G is way over sensitive and constantly either undershoots or overshoots where you're trying to navigate to. Right there makes trying use the app a real pain.

Skahroba ,

Very Unfair to say unworkable and Unusable

I bought the app and I find it very usable and one to work perfectly well. I have noticed when it comes to zooming there are issues that need to be sorted, however with a bit of patience you can zoom to wherever you like. One thing to remember the maps are generated on the fly from millions of vector data and they are not images, zooming in this case is very different. I am amazed how fast 100 megabyte file of elevation contours are generated. The user interface is very basic and simple but works perfectly. Features like calculating distances, area and adding the notes are very important to have. I have not seen any other app related to geology like this. Price is incredible . I recommend it and give it 4 star.

HrAlb ,

Unusable on older devices

Zooming moves the centerpoint, usually shifting the area of interest right off the screen. Dragging to get back to the area of interest requires experience and talent - my current theory is that a long touch, followed by a slow drag, keeping the touch until the map shows up, may help.

On an iPhone 4s, that's pretty much the end of the story. On an iPad mini 2, zooming and dragging are workable, but not great. Makes me wonder if the app is redrawing the entire world-space, instead of just the view-window.

Vector maps can perform better than typical raster-tile maps, so being vector is no excuse. Nor would that explain the awful UI, nor the non-sticky settings.

The only explanations I can think of are inexperienced programmers and no respect for users.

Needed fixes -

- Zoom centered on screen or between pinch touchpoints

- Turning on location services should provide an option to center map at location (duh!)

- Sticky settings

So it looks like until the developers get their act together, I can't use this on the 64gb 4s I intended, but only on a 16gb device that doesn't really have room for it.


App Privacy

The developer, Geobyte Europe S.L, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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