If I am creating data from satellite imagery, is this classed as primary or secondary data? If I am creating slope data from a DTM, is this then classed as primary or secondary data?
I try to find the meaning of the categories DN and DRVAL2 when I used them in the command: lrenderer = new QgsCategorizedSymbolRendererV2("DRVAL2" , Categrories ); Is there any tutorial or ...
If a (printed) map is created with an small map in the corner showing the extent of the main map frame in relation to the state/province etc. with a box. What is the proper cartographic term to label ...
I was checking in the literature about a formal definition for hyperspectral sensors, and the most complete definition I found was from The Center of Space Research (@ University of Texas in Austin): ...
I'm familiar with these terms used by ESRI: Layer Stores visual properties (color, symbols,…) does not store data (attributes, coordinates) links to a Feature Class (or raster data) Feature Class ...
There are definitions for the geometric qualities of polygons and lines: polygonal: Having many angles; hence characteristic of a polygon. Ref: http://en.wiktionary.org/wiki/polygonal ...
My organization uses *.lyr files consistently as a means for our users to view the data and build their mxds. It works great for our purposes, but we have run into an issue where we don't think the ...
Just trying to find a definition. I was asked this in an interview and I assumed it was a polygon created by incorrectly modifying a another polygon in a coverage. According to my best googling ...
Whenever I do a presentation about anything related to GIS, I consider the level of knowledge of GIS of the audience. The worst times are definitely when I need to explain GIS to a group that has ...
I'm defining "address" as "a physical location, usually visibly numbered". Numbered was used in the definition to exclude purely geographical features not usually considered to have or need an ...
Reading through GIS literature, it sometimes feels that authors use the two terms with a specific meaning in mind. I always treat the terms interchangeably. Am I wrong? Read the first line in the ...
I am listing some of the acronyms used in our work and had to stop to think about whether to list these together or separately. In some circles they are synonymous, in others they have distinct ...
What is the best definition of Geographical Information Systems? Has the definition changed at all since I was taught it 10yrs back? The technology has changed a lot and it is more powerful than it ...
When speaking or writing about GIS all too often the concept in peoples' minds for Geographic Information Systems can be rephrased as "the software for map data". While software is integral to GIS, ...
I realize this is a sort of a subjective question, but I've seen other subjective questions on the site, so I thought it I'd put it out there. A colleague recently had a request for "geospatial data" ...
What's the difference between a projection and a datum?