The science of structure, composition and development of Earth and other planets. Mostly concerned with planetary processes and resources.

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Seeking TLS point cloud and image data about geological surface?

I am learning about the integration of point cloud data acquired by TLS and image data acquired by camera for geology application. I am trying to test some algorithms about this research, but I have ...
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1answer
42 views

How to do diagram block with open source software?

I would like to do a block diagram (topographic and geological representation). Is it possible to do this with QGIS (or other open source software), in Windows 7?
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41 views

How to get symbology (.lyr?) for USGS geologic maps?

I work a lot with USGS geologic maps and always have the same problem. I am able to download the files from the website (in .e00 format), and make a nice shapefiles out of them. My problem is that ...
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2answers
146 views

Can LiDAR differentiate between rock and soil?

Can LIDAR by itself, tell the difference between rock (large and small) and soil? I'm under the assumption that the answer is no. However, I wanted to check here with the experts as I was told by ...
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40 views

QGIS as Spatial Database RAD or Hierarchical Attribute Viewer/Editor?

I have designed a geological observational spatial database in PostgreSQL/PostGIS to manage geochemical samples, QAQC and geological map objects. Now is the not so fun/easy part of designing a front ...
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58 views

Python for validating domains

I need to create a Python code for validating domains compared to another set of domains. The initial premise here is taking Collector data, downloading the attributes, and comparing certain domains ...
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46 views

Collector Python data editing

So just to start off with... I have a horrible rudimentary level of Python, so if someone plans on dropping code as an example, I will definitely have trouble following it. Apologizes abound... I do ...
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1answer
67 views

ArcMap: Raster layers, how to extract information

I have several raster layers which represent particular geological formations. Each layer is a raster dataset in a grey scale. Each cell has a pixel value which is an elevation of the bottom of a ...
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1answer
33 views

How can I make a polygon from intersecting lines of different layers in QGIS?

I am constructing a geological map which involves constructing boundaries to areas which vary in style across their length depending on how well defined they. To do this I have created two distinct ...
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2answers
583 views

Are there any geology fill pattern libraries for QGIS?

I'm making a geologic map using QGIS but I don't know how to draw a limestone lithology in QGIS. To draw other lithologies I combine lines and dots in the best possible way but is very limited. Any ...
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1answer
636 views

3D geological model from cross sections, preferably using Open Source software

I work with engineering geology, and my workflow includes making many cross sections of a given site, with data from maps, fieldwork (outcrops) and boreholes. What I'm looking for is a way of taking ...
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1answer
46 views

Mapping carbon sequestration potential as green infrastructure function?

I have a small project where I have to do mapping of potential areas for carbon sequestration in the Adelaide Metropolitan area in South Australia. I have no idea what data do I need. So far looking ...
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2answers
291 views

“Official” delineation of North American mountain ranges

I need to subset mosaics of remotely sourced data to the extents of several prominent North American mountain ranges, starting with the Sierra Nevada. After searching for the boundaries of the range ...
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1answer
337 views

Interpolation and classification of soil texture data

I am trying to interpolate soil texture data on a research area. I know how to interpolate the data by making three layers for clay, sand, and silt. What I want to know is if there is anyway to ...
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1answer
2k views

Are there any geology symbol libraries for QGIS?

are there any structural-geology symbols libraries (and geology in general) for QGIS? Many thanks
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124 views

ASTER mineral indices with VINR and SWIR data

I need to run a supervised classification on ASTER data in order to map a rock formation, which is composed of chert. There is no shortage of indices which can be used to highlight silica rich ...
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1answer
209 views

QGIS still not rendering WMS layers

Similar to Neil's question of March 8th 2013: QGIS not rendering WMS layers I can down load the BGS 1:50K bedrock and superficial deposits maps OK, but they don't render except at scales greater ...
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41 views

High Resolution Mineral Maps

Australia has recently published high resolution surface mineral maps using data from ASTER see here. Does anyone know of similar free products available for the entire globe?
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1answer
1k views

How to go with…somewhat complex geological maps in QGIS?

Just a follow-up to this question QGIS: Line to polygon conversion. Not sure do i have to continue there itself... We are currently digitizing a geological map...which has 36 features in total. Some ...
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1answer
211 views

QGIS: Line to polygon conversion

Currently we are working in a geological project..in which all the Contacts, Linear & some other geological features have to be captured. The thing is most of the features have to be Captured as ...
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1answer
335 views

Combining Geological Grids and extruding between them?

I have a situation where I have 3 Geological grids, each showing a different horizon + the Seabed Grid. I need to extrude between these grids in order to make the 3D polygon for the geological ...
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708 views

application of gis in geology [closed]

I am a student of geophysics and I am studying geographic information systems (ArcGIS) and we have been given a project. As I do not have much information about GIS capabilities can you please suggest ...
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1answer
125 views

What expression returns data defined color from a color field eg: (30 50 40 10) using color_cmyk

Hi I have a geology plan with a base color field. I need to write an expression in the data defined color option using "color_cmyk" command. I can not seem to get the expression written correctly. The ...
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2answers
890 views

How to clip all shapefiles, layers, etc associated with global map of Mars

I'm working on a project where I've found an open source NASA .mxd of shapefiles, layers, metadata, geology, a 30x30 graticule that splits the lat and long into 30 degree square polygons, etc. I only ...
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3answers
1k views

How to color-code geology maps with given CMYK colors?

I'm trying to understand whether it is possible to corectly display colours in British Geological Survey maps. Our client has a licence to use the shapefiles but unfortunately BGS don't provide SDL ...
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213 views

Geology plug-ins for QGIS

Sorry this is probably a very basic question but I'm new to QGIS and struggling with it a fair bit. I'm trying to get a plugin to show me the geology (preferably solid and drift) of an area and have ...
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121 views

Is it possible to use USGS .shd files in QGIS?

Has anyone successfully used QGIS with US Geological Survey shd files to map geology - specifically to display colors and geological symbols (dip/strike etc) stored in a USGS supplied shd file. ...
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121 views

Identifying Intersections of Geology using PostGIS

I'm having problems identifying intersections on a layer of linework, the lines are representative of contacts and faults (geological rock formations). I am trying to select where there are connected ...
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1answer
232 views

Scanned Transparent Map Overlay

We have a flat file of 50 Geology maps that have a transparent overlay with faults and drill holes. I have them scanned and georeferenced as TIF images and they will be used in ArcGIS 10.0, 10.1 and ...
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3answers
8k views

How to merge many individual KML layers into one?

I'd like to open a USGS KML file of bedrock geology for an entire county, but there are over 2,000 individual polygon layers. Does anyone know if there is a way to merge all of these layers together ...
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2answers
1k views

Are there any free tools that can view and edit ArcGIS Map Packages?

I'm looking for a tool that can open ArcGIS Desktop 10 map packages (.mpk files) and allow in a simplified way for a third-party to add geology cross sections and well points. Any suggestions? It ...
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113 views

Looking For Free Global Bedrock Geology Data

I've searched around for a freely available global bedrock geology data set, but I have yet to find one. Anyone come across such dataset?
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1answer
1k views

What is the best way to visualize subsurface drillhole and borehole geology data within ArcGIS?

I've heard some folks in mining are using Target for ArcGIS extension by Geosoft to visualize and analyze subsurface drillhole and borehole geology data within ArcGIS. Does anyone have experience ...