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67 Cards in this Set
- Front
- Back
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Abrupt data |
Sudden changes to boundaries as opposed to smooth changes
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Balance
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The organization of map elements and empty space that results in visual harmony
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Continuous Data
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Throughout a geographic region of intersect
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contrast
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Visual difference between map features that help to distinguish one from another
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Figure ground
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Methods to accentuate certain features by making them appear closer
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Frame line
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Sometimes it is the same as the neat line, but not always. The frame line is like the picture frame. All graphics are enclosed.
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Generalization
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Process of reducing information on a map
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Gestalt Principles
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The manner in which people tend to see objects in their entirety before (or parallel with) its individual components
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Inset |
Smaller map within the context of a larger map
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Locator inset
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provides context
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Enlargement
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Refers to area that is also shown on the larger map
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large scale map
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scale as represented by a ratio or a fraction, is large.
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Map orientation
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The state of being in correct relationship in direction with reference to the points of the compass.
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Topology
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Rules concerning the relationships between the points, lines, and polygons that represent the features of a geographic region.
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Typography
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Process of specifying, arranging, and designating type
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Visual hierarchy / Weight
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Symbols and map elements are ranked and graphically represented according to their importance.
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What are the three data models?
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Vector, Raster and Surface
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Vector
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points lines and polygons
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Raster
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pixels and cells
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Surface
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Cells, TIN (don't need to know)
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What is the native data format for ArcGIS
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Geo database
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What are the three types of geodatabases?
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Personal, File and enterprise
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The Geo database types can all store...
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Vector, Raster and surface
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Personal GDB uses what database program
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Microsoft Access, its a single user
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File GDB uses what database program?
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ESRI proprietary
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Enterprise GDB database software?
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Microsoft SQL server, IBM DB2 and Oracle
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Personal GDB you see
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A single file with a 2gb limit
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File GDB is
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Multiple files seen with a 1tb limit
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Enterprise you see
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1 - 2 files with unlimited in size
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What are some other supported ArcGIS formats
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ESRI- Coverage (vector), grid (raster), TIN (Surface) and a shape (vector) file
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shapefile folder contains
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.shp , .prj and .dbf 3 to 7 files typically contained in folder, for every item 3 folders
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The coverage folder holds
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4 folders (streams, wells, soils and info) For every file just add one to find out how many files are associated
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Personal Geodatabase contains
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one file only. It stores all three feature classes (.mdb) Only one file no matter what. Best way to send data.
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projection (text book)
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nothing will give you more issues than this. It is the transformation of the spherical coordinate system to a planar coordinate system.
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Projection (ESRI)
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The complete coordinate system definition of a GIS dataset including the Geographic Coordinate System, datum and projection
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Coordinate systems
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Unprojected and projected
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unprojected
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has GCS and datum defined, map in units and has no projection in the CS definition. (Decimal degrees)
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Projected
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Has GCS and datum defined. map units feet or meters and has projection in CS definition. (common map projections, Mercator)
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Columns in the FAT are also called
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Fields, attributes
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Every column and row leads to this...
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An attribute value
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text as attribute value also known as...
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string data
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What numeric data types are there?
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Number (integer, float) and date
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What are the three modes of queries?
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Interactive selection, select by attribute, and select by location
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select by attibute is also known as
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aspatial
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Select by location is sometimes known as
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spatial
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What does SQL stand for?
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Structured Query Language
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a single quote indicates
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that the value is string data
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operators are...
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things that define the attribute value from the field it is a part of...
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what are some types of operators?
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Relational (<,>,=), Boolean (and, or, not), and other (in, like, between)
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Boolen
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Means true or false.... binary
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Equal to is the only operator that can...
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be used with text and numbers...
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use parenthesis...
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To enforce order of evaluation
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When putting a table together you are talking about
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Joins and relates
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For 1 - 1 we use
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Join
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For many to one we use
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Join
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For 1 to many we use
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relate
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one to one is this type of relationship...
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record to record...
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F.A.T. stands for
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feature, attribute table
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Features are
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points, lines and polygons
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ArcMap is
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the main engine
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Arc Catalog is
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Data organization
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Arc Toolbox are
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the programs that make the software work
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.mxd are
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the map documents. It is NOT data... only pointing to where the data is located at (data paths)
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relate vs join
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Join puts the two tables together while relate does not join and append tables...
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Clip and Intersect can be used for this type of input
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point, line and poly
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Union can only be used for this type of input
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Polygons
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dissolve is
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attribute based that simplifies and generalizes |
