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Stop Making Basic Positioning Mistakes!

Make a geodetic New Year’s resolution: stop making basic positioning mistakes! This New Year, why not resolve to stop making basic geodetic positioning mistakes in your ArcGIS documents. We’re sure your boss, customers and organisation will thank you. To help you with this, Exprodat and Priemere GeoTechnology have collaborated to create a free tool, called the Geodetic…

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11th January 2013

Tip 22: Using Raster Catalogs

Using a Raster Catalog in ArcCatalog You can use a Raster Catalog to store high volumes of imagery. You can create them from the File menu in ArcCatalog, or from the Create Raster Catalog tool in ArcToolbox. When set up and populated, with some image tiles selected, it will look something like the image below: Using the…

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3rd January 2013

Using OGP’s EPSG Area Polygons

The International Association of Oil and Gas Producers (OGP) recently released EPSG Area Polygons as a freely available spatial dataset that accurately defines the applicable extent of the CRSs and transformations in the EPSG Geodetic Parameter Dataset (EPSG Dataset). However, use of the Area Polygons dataset is not as straightforward as it could be, as…

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15th October 2012

Using Tool Parameters in ArcGIS

Tool parameters are used to set values for elements within a script, allowing you to pick from a drop-down list or navigate to a location without having to edit any script code. Embellishing from my previous blog on listing files in a folder using Python, this blog shows you how to create a script that…

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4th September 2012

Tracking Company Assets in Real Time

This year two teams from Exprodat decided to enter the Oxfam Trailwalker 2012 event. We thought it would be fun to develop a map-based application to track the positions of our teams and devised a system whereby the walkers would carry smartphones containing built-in GPS receivers for gathering position information. This information would then be…

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13th August 2012

Creating Geological Block Diagrams

Most geologists like a nice geological block diagram and it is relatively easy to create one for presentations using a combination of GIS and a graphics application. I last created one way back in college (16 years ago!) using a combination of PCI satellite image processing software and CorelDRAW (a popular graphics application). So I…

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24th July 2012

Converting Rasters to XYZ ASCII Files

Raster data like digital elevation models (e.g. SRTM), bathymetry (e.g. GEBCO), and gravity (e.g. Sandwell and Smith) can provide valuable context to an area. Since only so much subsurface analysis and interpretation can be done in GIS, getting these rasters into other applications, like GeoFrame, Petrel and Petromod, is important to give wider context to seismic, well and…

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6th July 2012

Migrating Legacy Seabed Surveys to SSDM

Seabed survey datasets are assets of enormous value for offshore operators. Environmental, site, geo-hazard, debris and pipeline planning surveys catalogue features on and below the seafloor to support well planning, drilling and production operations – all expensive and potentially risky activities. Identifying hazards on the seafloor that can jeopardise these operations is of particular importance…

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12th June 2012

Creating File Listings with Python

Part of many data management projects is keeping a record of what files are where. Often this can involve creating a list in Excel of all files within a folder area. Doing this manually is impractical as, typing out the information takes a long time and of course can also be a demoralising task. A…

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28th May 2012

Top 10 Uses of GIS in Oil and Gas

Why should we use GIS? This is probably the question we hear most often in our discussions with our petroleum clients. And it’s not just from those oil and gas companies who have yet to embrace GIS – we sometimes hear this from companies that have already invested considerably in supporting technology and projects, but…

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4th May 2012
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