Indicates questions asking about the use and meaning of specific technical words in GIS.

learn more… | top users | synonyms

2
votes
1answer
38 views

Refering to 0° of longitude/latitude in a range

This is more of a question in diction... In scientific writing, is there a preferable way to write a range, bounded by 0° longitude, in a way similar to "5° W to 10° E" if there is no cardinal ...
2
votes
3answers
129 views

What is the opposite of height? [closed]

Considering that depth denotes the distance below sea-level to a point on an object located below sea level, and considering that height denotes the distance to some point above the surface of the ...
24
votes
2answers
1k views

Why do we use the terms “longitude” and “latitude” for a spherical body?

To specify a geographic coordinate we use the terms “longitude” and “latitude”. Far as I know, these terms derive from the Latin latitudo (= breadth) and longitudo (= length). In German we use the ...
4
votes
1answer
162 views

What are duck egg patterns in weighted moving average spatial interpolation method?

I'm dealing with spatial interpolation methods, in particular with the weighted moving average. I come across really oft with a term "duck egg patterns" which are caused by isolated data points. ...
5
votes
1answer
313 views

How is a geographic heat map different from a colored statistical thematic map?

From Wikipedia, A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors. Apparently, a geographic heat map is only one ...
1
vote
1answer
155 views

In Ogr2OGR: what is SRS?

I am trying to understand this command: ogr2ogr -f "MapInfo File" original.tab wgs84.shp -s_srs EPSG:27700 -t_srs EPSG:4326 I don't understand the s_srs and t_srs paramaters. The help file says ...
5
votes
1answer
320 views

Terminology problem - Raster vs Grid vs Lattice

I have a question about GIS terminology - what is the difference between grid and raster and grid and lattice - in theory?? I thought, that raster is regular network and value is in the cell and the ...
4
votes
3answers
512 views

Difference between lon and lng [closed]

When browsing the web and documentation I see the abbreviation lon and lng used for the longitude part of geometry. I was wondering if there is any difference between lng and lon.
4
votes
1answer
909 views

What is the distinction between Difference and Clip in QGIS?

What is the primary distinction between the Difference and Clip geoprocessing tools in QGIS?
3
votes
3answers
247 views

Can ArcGIS Server be called ArcSDE? I'm confused about terminology

I'm confused about some ESRI terminology. If I have ArcGIS 10.1 Server installed and we use Enterprise geodatabases with versioning capabilities but we use direction connections does this have ...
9
votes
1answer
111 views

Is there a name for a situation when the place is clearly or unclearly named?

This is not specific to any system. Suppose there's a large red rock on a terrain which can be easily found and clearly seen and there's an artificial object such as a mall near that large red rock. ...
14
votes
3answers
323 views

When did the word “geospatial” first come into usage?

For historical reasons, I'm trying to figure out when the term "geospatial" came into use? The earliest usages I can find are from around 1994, but I would be really surprised if it wasn't used ...
3
votes
1answer
31k views

What is the difference between Vector and Raster data models? [duplicate]

From: http://support.esri.com/en/knowledgebase/GISDictionary/term/vector%20data%20model vector data model: [data models] A representation of the world using points, lines, and polygons. Vector ...
10
votes
2answers
579 views

How do I describe a special relationship between connected edges?

Consider this simple situation where three edges connect at a node: I’d like to write a succinct and clear description of the relationship between A and B in such a way that differentiates it from ...
5
votes
1answer
55 views

Proper name for area defined by coordinate pair and radius

In defining geography objects within software, I have things such as a City Area, which is an area defined by the bounds of a city, or a County Area, defined by the county boundary. What is the ...
6
votes
3answers
3k views

Spatial data? Geodata? Geographic Data? Geospatial data?

Language changes all the time and I see various uses of the words defining the data we use in GIS in our day-to-day lives. But what's right? Is there a right answer out there that we would all agree ...
2
votes
0answers
31 views

What's the usual term for “ground plan based”

I don't know if "ground plan based" is the right word in the following context: A computer program reads a ground plan and produces a result ground plan. The result groundplan's deviation from the ...
4
votes
1answer
466 views

Correct use of the terms geographic, path, and Euclidean distance

I often use the terms geographic and Euclidean distance interchangeably when referring to the length of the shortest straight-line distance between two points on a map. Is this correct? I use the ...
7
votes
3answers
228 views

What's a term for Sea Level Distance which is usable by novice users?

I've been using the term Sea Level Distance to describe the total length of a line string where I ignore the elevation and just calculate the distance from point to point along the ellipsoid and sum ...
1
vote
1answer
81 views

Continents and islands

What would you call the polygon corresponding to a coastline theme? Land mass? It corresponds to continents and islands, but I'm not sure about the best word. The opposite of the sea.