Term
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Definition
| 3 or more lines joined to form a closed area. in maps, they share line with adjacent polygons |
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Term
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Definition
| square cells of color designated by a number. rectangular array of pictures makes up an image |
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Term
| True or False: Vector maps and raster images can be plotted together. (who or why not?) |
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Definition
| vector maps and raster images are able to be plotted together. they use the same coordinate system (x,y) |
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Term
| what are the only map features that have raster images? |
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Definition
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Term
| what are the 5 classifications of map layers? |
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Definition
| physical, political, legal, statistical, administrative |
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Term
| what is the statistical map layer used for? |
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Definition
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Term
| what is the administrative map layer used for? |
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Definition
| to assign responsibilities to people |
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Term
| what is the legal map layer? |
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Definition
| used to identify deeded land parcels owned by individuals, companies or the government. |
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Term
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Definition
| converting analogue data into digital data |
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Term
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Definition
| any spatial data that's in a computer compatible format? |
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Term
| two spaces are topologically equivalent if... |
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Definition
| one can be distorted without cutting it |
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Term
| Boolean values can only be... |
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Definition
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Term
| what is spatial analysis? |
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Definition
the process of transforming and manipulating data to add value and support decisions.
(turn raw data into useful information) |
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Term
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Definition
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Term
| Methods of spatial analysis |
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Definition
Queries,
Measurements,
Transformations,
Descriptive summaries,
optimization,
hypothesis testing |
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Term
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Definition
polygon on polygon
point in polygon
line in polygon |
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Term
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Definition
DRG
Raster
scanned USGS topogrpahic map
georeferenced and projected
used as backdrop for other data and digital maps
7.5 minutes
1:24000 |
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Term
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Definition
DLG
vector
USGS national maps
georeferenced
7.5 minutes
1:24,000, 1:100000, 1:2million
used for boundaries, hydroplogy, roads, cultural features |
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Term
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Definition
raster
LIDAR, NED
georeferenced
extent and scale varies
used for elevation data, aspect shaded relief, drainage info |
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Term
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Definition
-find a better way of doing something
-use spatial analysis to identify newer, better designs
-concerned with identifying the best decision to make, uses predecided restrictive conditions with only 1 factor
-optimization |
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Term
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Definition
measurement of things around a pt/line/polygon. used to get data around a certain area
or divides a layer in to two parts, that withing nad that outside the given distance
-when buffers overlap they dissolve |
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Term
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Definition
| operations on a raster, create a simplified raster |
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Term
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Definition
Digital Orthophoto Quadrangles
(aerial) |
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Term
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Definition
topologically integrated geographic encoding and referencing
uses census data |
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Term
| Fundamental problem of GIS (Longley) |
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Definition
| what to put in what we leave out. |
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