In our earlier Exprodat blog Creating Geological Block Diagrams, we showed how to create block diagrams using satellite imagery and a digital elevation model. In this blog I look at how to make block diagrams directly from gridded surfaces, creating visual representations of the blocks. The workflows described require ArcGIS Desktop along with the 3D…
Read detailsThis training tip follows on from our previous blog “Top 10 ArcGIS Printing Checks“, and introduces some of ArcGIS 10.1’s dynamic legends capabilities. The problem You’ve got a good map, but your legend is stopping it from being a great map: In older versions of ArcGIS, you could either put up with the deficiencies, or spend…
Read detailsWhen you want to run the same geoprocessing tool on many feature classes, one option is to right click the tool and select the batch option, but it can be tedious to add all your datasets to the list – the entry columns have to be widened to check that the paths have been entered…
Read detailsCan the Renewable Energy industry leverage the lessons learnt by its Oil & Gas brother? Last year the Renewable Energy Focus magazine published the feature “Oil, Gas and Wind: offshore harmony?” which argues that there are opportunities for skills transfer between the Renewable Energy (RE) and Oil & Gas (O&G) sectors. The feature highlights various areas where this…
Read detailsHow to calculate the true distance over a surface A point-to-point distance taken from a map does not provide a true measurement of the distance between those points; I have to take the intervening topography into account, as shown below. To calculate the 3D length of a line (in ArcMap, with the 3D Analyst extension)…
Read detailsConfirmation Bias: a tendency of people to favour information that confirms their beliefs or hypotheses: Wikipedia*. It’s a terrible disease for the petroleum explorer. Succumbing to confirmation bias often leads to overconfidence in one’s ability to predict outcomes, technical risk underestimation and poor decision making. Wishful thinking syndrome is also a common side effect, and the…
Read detailsStereo viewing, or Stereoscopy, has long been used by geoscientists to create the illusion of depth. Traditionally, overlapping air photographs (“stereopairs”) have been viewed with a stereoscope, where the stereo effect is created from a slight offset in the viewpoint of each of the stereopair photographs. Investigating an area in “3D” affords a greater understanding…
Read detailsThe GeoEvent Processor is an extension for ArcGIS for Server version 10.2 that processes real-time data – for instance, vessel or vehicle position information. In addition to allowing the display of real-time data in, um, real-time, the GeoEvent Processor provides GeoFence and other functionality that enables alerts to be automatically generated – for instance, you…
Read detailsHave you ever wanted to hide sections of the layers on your map but not wanted to clip your data to do so? For example, you might want to show all of the 2D seismic available within your company’s license blocks, but hide the data when it is over another company’s blocks, as illustrated in…
Read detailsAnother spreadsheet of coordinates! When planning seismic lines it’s typical to have a spreadsheet of start and end point locations, representing the seismic lines to be shot in the survey. In ArcMap it is possible to generate a set of lines from these points using a single tool – the XY To Line tool. Workflow Prerequisites:…
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