Raster vs Vector GIS
Raster GIS and vector GIS operate differently and are used to address different types of geographical problems. […]
Category
GIS Basics
Data input techniques in GIS
Here’s an overview five GIS data input techniques (ie. five ways to create a GIS map).
GIS Analyst – What Does One Do?
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
The Importance of Data Currency and Data Consistency
For Attribute data, Data Currency and Data Consistency are very important concepts. When you’ve finished reading this post you’ll understand that you can't just pick up an old dataset and
GIS Data Sources – Map Archives and Old Reports
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.
What determines the scale of a map in GIS?
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
Choropleth Map Data Classification
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
What is Quantum GIS
What is Quantum GIS What is Quantum GIS (QGIS) - its a brand of Geographical Information System that is Open Source and so free. Its been around since around 2002 and
What is Spatial Data
What is Spatial Data The four simple map structures in a GIS are Points, Lines, Polylines and Polygons. If you were to on-screen digitize the figure above then each of the
Digital Map Products and the GIS Revolution
A typical map storage facility. This one is from the US Library of Congress (photo Beatriz M Haspo, 2011) There will always be a place for paper maps because sometimes computer
GIS Metadata – The 5Ws
Have you ever wondered how GIS Analysts work their way through thousands of files of data? How do they manage to extract information about certain locations and their characteristics in
GIS Attribute Data
Points, Lines, Polygons, and Polylines in a GIS are dumb graphics. We make them intelligent by attaching attributes to them. That way we can tell that a point is a
Air Photo Interpretation
There's a lot you can tell just by looking at an air photograph. However, you shouldn't just be a “tourist” when you look at air photos. Below, we've listed the top
Top 10 Most Common Traps With Census Maps
There are many potential Traps with Census maps. Below, we talk about the most common you'll likely find: Privacy Small populations must be disguised for privacy reasons. This gives people the confidence to
Introduction To GIS Data Concepts
Question: Why do we need Geographic Information Systems like Quantum GIS, ArcInfo, ArcView, MapInfo, Caliper software, GRASS and Manifold? The answer: In this Introduction To GIS Data Concepts, I'm going to
SQL for GIS Table Query
SQL for GIS Table Query - Introduction Structured Query Language (SQL) is a very common, very generic language in computer systems. It has implementations in lots of different brands of databases
The History and Development of GIS
Are you interested in Geographic information systems? If so, you'll be surprised to know they are considered among the most fascinating technological developments of modern times. What Is GIS? The term GIS refers
GIS Software – How It Works
The advances in modern mapping technology are exciting to say the least. GIS is now going where no mapping system has ever gone before. Remember the old paper maps we used just
GIS Analysts – The Cold, Hard Truth
Employment opportunities for a GIS Analyst have continued to expand, year over year. With most of the major land planning now being done with the help of automated systems and computer
GIS & Economic Development
Are you aware of the fact that GIS models play a significant role in economic development? Geographical information systems have been playing a great role in recording and presenting ecological and
Enhanced City & Community Planning With GIS!
Did you know that millions of people around the world use geographic information system technology to enhance their businesses for more productivity? Geographical information technology allows city planners and developers to
What does World Geography define?
This Earth is diverse in all its glory, from people to cultures to regions. Is it not fascinating that different attributes of different places make us stand apart, but the
Cartography, Abstraction And The Hidden Connection To Journalism!
There is a famous saying that a picture is worth a thousand words, but whoever said this wasn’t very familiar with cartography. Cartography is the art of reading maps and the
Top 3 GIS Remote Sensing Applications And Technologies
Sure, you may know most of the ways GIS remote sensing is used in its standard element of mapping. You may have studied the various image taking processes from planes
The GIS IT Job Market Is Trending
The GIS IT sector looks like it's going to be a great career opportunity right now and well into the future. Sure you might be passionate about the field and
GIS Today and Tomorrow
We live in an exciting world, don't we? Technology is evolving and growing at a faster rate than ever before, and Geographic Information Systems is a fine example of this. A New
So What Does The Future Of GIS Hold? Discover Now!
The pace at which Geographic Information Systems are developing, there is no doubt that the future of these systems and networks will be anything but monotonous. Experts and analysts predict