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48 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Spatial data |
Data w/ Geographic location, representation, or reference point that it describes |
Data |
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Cartography |
Science of map making |
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Shapefile |
Esri Data format for storing geographic data |
What does this data format do |
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Scale |
Ratio of size of elements on screen or in print in relation to real world size |
Ratio of... |
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Raster |
Spatial data that stores location based upon a single point and data stream of known width height and resolution |
What does this spatial data store |
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DEM |
Digital Elevation Model - specific use case of raster data where the pixel value represents elevation of areas covered by pixel |
Specific raster data |
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Vector |
Spatial data that stores location using Cartesian coordinate locations |
Using Cartesian coordinate locations what does this form of Spatial data store |
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Vector (Point) |
Single spot in 2d space. Attributes represent that location |
2D space |
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Vector (Line/Polyline) |
Multiple points connected to represent all locations along connection |
More than one point |
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Polygon |
Multiple polylines connected to create a boundary. All in Polygon zones have same property |
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Coordinate System/Spatial Reference |
Defines origin point, coordinate space, and geoid for a datasets spatial data |
Defines what three things for a datasets spatial data |
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CS/SR (Datum) |
Origin point of coordinate system and info required to accurately define origin |
Coordinate System |
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Geographic Coordinate System |
A coordinate system that specifies latitude and longitude as coordinates |
Uses what location determiner as coordinates |
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Projected Coordinate System |
Projects/transforms coordinates into a new coordinates system to display a map in 2d space |
Similar to and includes a GCS |
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Resolution |
Density of data in raster (sometimes any) dataset or rasterized map document Datasets - length of a pixel Rasterized graphic format - pixels per inch or dots per inch |
PPI & DPI |
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Geoprocessing |
Practice of using GIS tools to process, transform, filter, and query GIS data |
Practice of using GIS tools |
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Join |
Use of a common attribute to link data tables in order to access attributes of one along w/ the other or assign attributes of one to the other based upon key value |
Links data tables to preform what... |
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Spatial Join |
Linkage used to connect datasets is location |
Similar to a join |
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Symbology |
Representation of a dataset |
Represents what on a map doc |
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Tables |
Data structure with defined set of fields, rows representing individual data records |
What is defined in tables, is it structured? |
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Fields (columns) (table) |
Variable represented in a data table. This field can be looked up per record |
Related to tables |
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Rows |
Individual data records |
Related to tables |
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Primary Key (tables) |
Identifier attribute, assigned automatically by database MGMT engine, provides a unique integer value by which to reference a data record |
What does this identifier attribute do |
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Environment Variables |
Variables/settings that affect the run of a geoprocessing tool |
They affect the geoprocessing tool |
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Basemap |
Prerendered set of mapping data that can be placed below the data of interest to quickly create a map w/ context |
Prerendered context |
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ArcMap |
Interface for geographic data analysis, querying, layout, and export |
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ArcCatalog |
The interface for geographic data mgmt |
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ArcToolbox |
Suite of tools for analyzing, transforming, and querying geographic data |
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Map document |
Very much like a word document, stores info about a map and it's layout. Does not store geographic data or import it - can't be sent like other docs |
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.mxd |
File extension |
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Data View |
Interface used to view and query data in arcgis |
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Layout view |
The interface used to design and lay out a map for export - all nongeographic elements |
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Data Frame (layout view) |
The container for layers in layout or data view, viewport for data on the page in layout view |
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Feature class |
Data stored in am ESRI geodatabase. Feature class is a collection of features with same geometry type, projection, and fields Aka dataset |
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Personal geodatabase |
Geodatabase that uses Microsoft Access 2003 format databases as the container, allowing it to be used as a database within Access and for spatial data |
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File Geodatabase |
Esri proprietary database format. Can only be accessed reliably from Esri. Can save huge datasets and data |
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Default Geodatabase |
Default location used to save and export |
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Spatial Analyst |
Extension to ArcGIS adds significant raster processing functionality |
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Table of Contents |
The set of layers in ArcGIS |
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Orthophoto |
Aerial photo whose pixels are location for the differential distortion created by lens and elevation of land |
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Watershed |
Entire land area contributing to water flow at an outlet or stream junction |
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Contributing Watershed |
Watershed based upon arbitrary point of interest |
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Blue Lines |
Cartography term for streams |
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NHD - National Hydrography Dataset |
Dataset that contains water bodies and streamlines for US |
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Flow lines |
Streamlines contained within NHD |
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WBD watershed boundary dataset |
Dataset containing nested watershed boundaries for the US |
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NHDPlus |
Enhanced version of NHD that adds attributes |
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HUCs - Hydrologic Unit Codes |
Watersheds created by the WBD HUC12 useful for refined scle |
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