Term
| What are the 6 main things that GIS does with data? |
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Definition
1. Collect Data
2. Store Data
3. Maintain (Edit) Data
4. Analyze Data
5. Output Data
6. Distribute Data |
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Term
| What company created GIS? |
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Definition
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Term
| What are some other GIS Programs? there are 5 of them |
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Definition
1. Geomedia
2. IDRISI
3. Mapinfo
4. Autocad Map
5. GRASS |
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Term
| What is the question you have to ask yourself when using GIS? |
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Definition
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Term
| What do coordinate systems consist of? |
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Definition
-Latitude
-Longitude
-Spherical Coordinates |
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Term
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Definition
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Term
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Definition
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Term
| what is the equation for getting DMS (Degrees Minutes Seconds) to DD (Decimal Degrees)? |
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Definition
divide the amount of minutes or seconds you have by 60.
Ex. lets say you are given:
DMS 74 45' 13" W, you would then divide 45 by 60 and get .75, or 75 minutes or seconds. which mean that:
DD: 74, 75 W |
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Term
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Definition
| non-numeric, non ranked (Ex. Name) |
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Term
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Definition
| Ranked, No magnitude (ex. 1st, 2nd, 3rd) |
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Term
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Definition
| Magnitude of difference among your entities, can have an arbitrary 0. |
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Term
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Definition
| When you have an absolute 0, when zeo means nothing (for example, where there is no population) |
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Term
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Definition
Network of points, lines and polygons. this includes:
-Point
-Nodes
-Lines (which are 1-D)
-Polygons (which are 2-D)
-Cube (3-D) |
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Term
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Definition
a grid of uniform sq. cells,each of which has a value.
Ex. Photography, Land cover maps, continuous data. |
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Term
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Definition
| entities are separated by boundaries or space |
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Term
| What are some examples of Continuous Data? |
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Definition
-Temperature
-Elevation
-Rainfall |
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Term
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Definition
Study of geometric properties that do not change when forms are bent or stretched.
This Includes:
-Intersection between lines
-Adjacency: polygons are adjacent to each other and when points are within polygons
-Containment |
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Term
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Definition
| its a MAP FILE only works when it has (.mdb, .gdb, .shp) |
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Term
| What are .mdb and bdb files? |
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Definition
| these are GEODATABASES which include vector and raster. |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| these are DATABASE files (found in the spread sheet) |
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Term
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Definition
| measuring shape of the earth ellipsoid, also refereed to as an oblate spheroid |
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Term
| What are map projections? |
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Definition
| representations of the 3-dimensional Earth on a 2- dimensional surface. |
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Term
| which 2 types of projections are considered to be "OK" |
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Definition
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Term
| What is an Conformal Projection? |
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Definition
| The Mercator Projection is a conformal projection with correct shapes for landmasses but great exaggeration of size near the poles. |
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Term
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Definition
-North American Datum 1927
-Based on the Clarke 1866
-Based on one station in Kansas |
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Term
| What are some other GIS Programs? |
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Definition
-GeoMedia- Intergraph, Remote Sensing
-IDRISI- Clark University, inexpensive, runs on old computers
-Mapinfo- (Troy, NY)- Minor player
-AutoCAD Map- Add-on to AutoCAD
-GRASS- Army Origin |
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Term
| What are some examples of attributes? |
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Definition
| Name, size, physical attributes, collected rainfall |
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Term
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Definition
| lines that do not have topology |
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Term
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Definition
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Term
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Definition
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Term
| Planar/Azimuthal Projection |
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Definition
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Term
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Definition
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Term
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Definition
| light at far side of globe |
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Term
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Definition
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Term
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Definition
| Ellipsoid, known points benchmarks |
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Term
| what did Eratosthenes discover? |
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Definition
• Knew that the sun was overhead in Syene cause it went directly down a well
• He then traveled to Alexandria and noticed that there was a slight shadow and was different from syene
• He was able to dertermine the circumference of the earth of 40705 km which is very accurate but not exact. |
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Term
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Definition
-North American Datum 1983
-Has multiple benchmarks |
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Term
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Definition
-Universal Transverse Mercator
-Has 60, 6 degree zones
-Never Negative, the center of the zone 500,000m east of the false origin.
-For the southern hemisphere works by working your way down. Starts with 10 million at the center line and as you go down and will go to approx 3 million.
-Error is usually 1 to 10,000 off. |
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Term
| What is the State Zone Plane? |
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Definition
-Coordinate system based on a standard line running through a small zone.
-False origin: S and W.
-In feet, opposed to to meters.
-WE are in New York East. |
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Term
| What direction are trending zones that are involved in Lambert Conformal? |
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Definition
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Term
| What direction does trending zones go in TRANSVERSE MERCATOR |
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Definition
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