Posts Tagged Golden Software

visualization of geophysical data – tips for Surfer users

Posted by on Saturday, 12 January, 2013

MYCARTA blog:

“I have been thinking for a while about writing on visualization of geophysical data. I finally got to it, and I am now pleased  to show you a technique I use often.  This tutorial has shaped up into 2 independent posts: in the first post I will show how to implement the technique with Surfer, in the second one with Matlab (you will need access to a license of Surfer 8.08 or later, and Matlab 2007a or later to replicate the work done in the tutorial).

I will illustrate the technique using gravity data since it is the data I developed it for. In an upcoming series of gravity exploration tutorials I will discuss in depth the acquisition, processing, enhancement, and interpretation of gravity data (see [1] and [4]). For now, suffice it to say that gravity prospecting is useful in areas where rocks with different density are laterally in contact, either stratigraphic or tectonic, producing a measurable local variation of the gravitational field. This was the case for the study area (in the Monti Romani of Southern Tuscany) from my thesis in Geology at the University of Rome [2].

In this part of the Apennine belt, a Paleozoic metamorphic basement (density ~2.7 g/cm3) is overlain by a thick sequence of clastic near-shore units of the Triassic-Oligocene Tuscany Nappe (density ~2.3 g/cm3). The Tuscan Nappe is in turn covered by the Cretaceous-Eocene flish units of the Liguride Complex (density ~2.1 g/cm3).”

Details…


Visualization of geophysical data: Surfer

Posted by on Thursday, 9 February, 2012

“I have been thinking for a while about writing on visualization of geophysical data. I finally got to it, and I am now pleased  to show you a technique I use often.  This tutorial has shaped up into 2 independent posts: in the first post I will show how to implement the technique with Surfer, in the second one with Matlab (you will need access to a license of Surfer 8.08 or later, and Matlab 2007a or later to replicate the work done in the tutorial).

I will illustrate the technique using gravity data since it is the data I developed it for. In an upcoming series of gravity exploration tutorials I will discuss in depth the acquisition, processing, enhancement, and interpretation of gravity data (see [1] and [4]). For now, suffice it to say that gravity prospecting is useful in areas where rocks with different density are laterally in contact, either stratigraphic or tectonic, producing a measurable local variation of the gravitational field. This was the case for the study area (in the Monti Romani of Southern Tuscany) from my thesis in Geology at the University of Rome [2].

In this part of the Apennine belt, a Paleozoic metamorphic basement (density ~2.7 g/cm3) is overlain by a thick sequence of clastic near-shore units of the Triassic-Oligocene Tuscany Nappe (density ~2.3 g/cm3). The Tuscan Nappe is in turn covered by the Cretaceous-Eocene flish units of the Liguride Complex (density ~2.1 g/cm3).

During the deformation of the Apennines, NE verging compressive thrusts caused doubling of the basement. The tectonic setting was later complicated by tensional block faulting with formation of horst-graben structures generally extend along NW-SE and N-S trends which were further disrupted by later and still active NE-SW normal faulting (see [2], and reference therein, for example [3]).”

Read more…

1] If you would like to learn more about gravity prospecting please check these excellent course notes.

[2] Niccoli, M., 2000:  Gravity, magnetic, and geologic exploration in the Monti Romani of Southern Tuscany, unpublished field and research thesis, Department of Earth Science, University of Rome La Sapienza.

[3] Moretti A., Meletti C., Ottria G. (1990) – Studio stratigrafico e strutturale dei Monti Romani (GR-VT) – 1: dal Paleozoico all’Orogenesi Alpidica. Boll. Soc. Geol. It., 109, 557-581. In Italian.

[4] Typically reduction of the raw data is necessary before any interpretation can be attempted. The result of this process of reduction is a Bouguer anomaly map, which is conceptually equivalent to what we would measure if we stripped away everything above sea level, therefore observing the distribution of rock densities below a regular surface. It is standard practice to also detrend the Bouguer anomaly to separate the influence of basin or crustal scale effects, from local effects, as either one or the other is often the target of the survey. The result of this procedure is typically called Residuals anomaly and often shows subtler details that were not apparent due to the regional gradients. Reduction to rsiduals makes it easier to qualitatively separate mass excesses from mass deficits. For a more detailed review of gravity exploration method check agai nthe notes in [1] and refer to this article on the CSEG Recorder and reference therein.


Golden Software announces the release of Surfer 10

Posted by on Monday, 21 February, 2011

Surfer is the premier contouring and 3D surface mapping software. Surfer quickly and easily converts your XYZ data into outstanding contour, 3D surface, 3D wireframe, vector, image, shaded relief, and post maps. Create and combine maps from all popular formats and output them just the way you need. Virtually all aspects of your maps can be customized to produce exactly the presentation you want.

Top 5 Features

1.     Map Projections

2.     64-bit Installation

3.     Google Earth™ Export

4.     Property Manager

5.     Digitize Z Values

Map projection support is a very powerful new feature in Surfer 10. It allows you to combine data (data, grid and base map files) from different coordinate systems, and convert that data to a new coordinate system for the map to display. It saves you time and effort since you don’t have to do this conversion separately in a different program before using the data in Surfer. For example, you could create a contour map from a grid file in State Plane coordinates, add a post map layer using data in lat/long coordinates, and display the map in any coordinate system you wish.

It is easier than ever to format contour map levels with Surfer’s new customization abilities. Surfer 10 offers two different ways to edit contour levels: Simple (the default) and Advanced.

The Simple level method allows you to quickly and easily define and edit basic contour attributes, such as major and minor contour line intervals, major and minor contour line properties and color fill. You can make your changes and see the changes immediately on the map.

  • The Advanced level method gives you full control over contour level properties and allows you to make edits all the way down to the smallest details of your map. You can set a fill pattern, foreground/background colors, add custom labels or hachures, or load a levels file (*.LVL). You will need to enter the advanced Properties dialog, make your changes and click OK to see the changes on the map.

Working in Google EarthTM is becoming an increasingly popular method for sharing and displaying maps among colleagues and between consultants and clients. It is a simple and easy way to import maps and display information over an aerial image, and best of all, Google Earth is used ubiquitously. For these reasons, Golden Software has added the ability to export from Surfer 10 to KML and KMZ formats, so users can export their maps and open them directly in Google Earth.
This article will create a colored contour map, export it to a KML file and open it in Google Earth to see the results.


Golden Software for professional custom well logs

Posted by on Saturday, 18 September, 2010

The new Issue #63 of Golden Software newsletter focuses on some of the benefits of most recent product release, Strater ® 2. Use Strater 2 to easily create professional custom well logs. Quickly transform your raw data to professional logs in minutes with Strater 2, well log and borehole plotting software for geoscientists.

The individual articles are published on the Golden Software web site. The newsletters are filled with interesting technical tips, news of how people are using Surfer, Grapher, Voxler, MapViewer, Didger, and Strater, and (of course!) great illustrations.


The new Starter® for well logs

Posted by on Sunday, 5 September, 2010

Golden Software announces the release of Strater 2, a well log and borehole plotting software package for scientists and engineers. Create professional well logs, while saving time and money with Strater — a powerful well log and borehole plotting software package.

The flexibility Strater offers is unparalleled. Use Strater to graphically display your subsurface data:

  • Depth or elevation of wells and boreholes
  • Lithology, including percent lithology and lithologic descriptions
  • Multiple boreholes in a single view
  • A wide range of data: Spontaneous potential, gamma ray, caliper, neutron, DST, bulk density, resistivity, drilling rate, gas quality, total gas, and sonic data
  • Blow counts, sample number, sample type, permeability, RQD, OVM readings, percent recovery, and more
  • Contaminant concentrations, moisture content, and well construction details
  • Assay data, alteration or mineralization lithology, BTU values, and ash content
  • Ancillary well information such as notes, remarks, and other text items
  • Virtually any type of interval or depth data


Golden Software with Newsletter

Posted by on Sunday, 4 April, 2010

Golden Software announces the availability of Issue #62 of the DataPoints newsletter. This issue includes an assortment of articles to update you and provide you with useful applications of our software.

The individual articles are published on the Golden Software web site. This email message contains a brief introduction to each article. Click on the More… link at the end of the introduction to read the entire article.

Gridding and Displaying Lake Bathymetry Data Using Surfer – Part 1

Grapher 8 and Didger 4: Exporting Fit Curves and Resampling

Converting MapViewer Data to Display on Google Earth

Didger 4: Projection and Datum Tips

New Surfer and Grapher Upgrades Available

New Website Tools