When exploring for hydrocarbons the terms Play, Prospect and Lead (along with their related terms) often come up. This blog describes how they work together in an exploration context and as you’ll see it’s primarily based on scale. Play A combination of 3 principal elements; I say principal as each Read more…
Perhaps one of the most common queries concerning data import into any geospatial software regards the correct plotting of coordinate values from spreadsheets. This post provides a checklist that hopefully will encourage the understanding of coordinate values, the implications of how they are managed and the relationship to coordinate reference systems Read more…
Geomatics World has published, in their September/October 2018 issue, an article, written by Simon Kettle, on how the European datum of 1950 came about and how it became the de facto standard after World War II. Read the article in Geomatics World magazine by following this link.
Inspired by John Nelson’s work in the Cartography team at ESRI I wanted to create a paper cut out effect for the bathymetry of the Mediterranean and the Black Sea using ArcGIS Pro 2.2. The effects developed by the ESRI Cartography team really does give that impression of a paper cut Read more…
The web map of the World Port Index Twenty-Fifth Edition as published by Geospatial Geoscience is now available on ESRI’s Living Atlas. The Twenty-Fifth Edition of Pub 150, World Port Index gives the location, characteristics, known facilities, and available services of a port’s, shipping facilities and oil terminals throughout the Read more…
In a previous blog I mentioned how ArcGIS Pro did not have the functionality to create geodesic lines. Well there is an add-in available for that now and it can be used in ArcGIS Pro 1.4 – 2.0 as well as in ArcMap and ArcGIS Web AppBuilder. It is free Read more…
I own this map and perhaps one of the interesting things about this map is not only the wealth of information available and aesthetic quality but how over 40 European and adjacent countries worked together to create the seamless geology map hanging in my office as well as a GIS Database Read more…
What are Geodesic distances? A geodesic line is the shortest path between two points on a curved surface, like the Earth. They are the analogue of a straight line on a plane surface or whose sectioning plane at all points along the line remains normal to the surface. It is a way of showing Read more…
Introduction Map scale is one of the most important factors to consider when representing data on a map. It is important not to lose the message of the map by including too much data. The standard way of controlling the scalable visibility of data is by either using separate datasets Read more…
What is a Vertical Datum? The Geodetic Glossary (2009) defines height as ‘distance, measured along a perpendicular, between a point and a reference surface’. This definition is concise and direct but leaves a vagueness concerning the reference surface. This reference surface is the Vertical Datum. A datum is required to reach accurate and reliable Read more…