The Case for the GIS Analyst

The GIS Analyst sits somewhere between the professional with problems that need to be mapped and GIS Professionals. A GIS Analyst needs to know enough about the problem being mapped to ask intelligent questions of the scientists they’re working with, and enough about GIS to bring useful information to the them. The challenge is to bring maps produced in the field into a corporate GIS.

The GIS Analyst sits somewhere between the professional with problems that need to be mapped and GIS Professionals. A GIS Analyst needs to know enough about the problem being mapped to ask intelligent questions of the scientists they’re working with, and enough about GIS to bring useful information to the them. The challenge is to…

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QGIS vs ARC GIS

qgis vs arcgis

Geographic information systems, or GIS technology can be used for a wide variety of applications. As GIS technology continues to evolve, one question that is often asked is “which GIS is best”? Two popular GIS’s are QGIS and ARC. Choosing between them can seem difficult, but its my belief that the main aspects of your choice will boil…

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How to Overlay Maps

overlay580x600

In the video I tell the beginning of the story of how to overlay maps.  I’ll demonstrate one of the earliest examples of the strategic use of map overlay in planning. If you understand map overlay then you are a long way along the path to understanding GIS. There are a few people in the…

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GIS Data Sources – Map Archives and Old Reports

An example of a soil archive

Its not always possible to get all the data you want for your project off-the-shelf. Archives and Old Reports are one of a number of incredibly important GIS data sources. In fact, many GIS projects would not be possible without the aid of old archives and reports. I’ve used old reports to help with projects…

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Lets Define GIS – Two GIS Applications Examples

density of greek people in preston

Lets define GIS There are many ways to define GIS …and by GIS I mean a Geographical Information System. GIS combines spatial data (maps), temporal data (when things on a map happen) and attribute data (what things are). It uses these to create maps that summarize information in ways that make it incredibly easy to…

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What is a GIS map?

what is a gis map

Map 1: What is a GIS map? A GIS map contains points, lines and polygons What is a GIS map? Its a digital map that has two important features… Coordinate system: A GIS map is a computerized map that’s in a coordinate system. The coordinate system allows it to be related to other GIS maps…

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What determines the scale of a map in GIS?

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What determines the scale of a map in a Geographical Information System? There is a fantastic post about cartographic scale on the National Geographic site. The article makes the point that as the scale of a map changes then the cartographer is faced with choices. When producing smaller scale maps (think ship-in-a-bottle) that cover large…

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GIS Analyst – What Does One Do?

A gis analyst

What is a GIS Analyst? In other posts I’ve talked about the many aspects of GIS, particularly the technology, issues with data, and the way GIS technology is used. In this post I want to talk about the people who pull a GIS project together – GIS analysts. Ideally a GIS analyst is someone who…

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Using Remote Sensing for Arctic and Antarctic Sea Ice Change Detection

Remote sensing of sea ice cover change. Pink line is where the ice should be!

Using 25km daily remote sensing grid cell data from a satellite mounted microwave sensor, National Snow and Ice Data Centre (NSIDC) scientists have shown that the minimum extent of Arctic summer sea ice is almost half that detected in the late 1970s. As with any remote sensing data, the NSIDC tempered their interpretation with both…

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Choropleth Map Data Classification

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Choropleth Map Data Classification A Choropleth Map is also known as a Shaded Map and a Thematic Map Today, I am going to talk about Choropleth Map Data Classification. This is a very important part of GIS, and this article will help you gain better insight into the process. Be sure to comment below, if…

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