GEOG 379- Midterm Exam Guide - Comprehensive Notes for the exam ( 37 pages long!)

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Published on 16 Feb 2018
School
University of Illinois
Department
Geography
Course
GEOG 379
Professor
UI
GEOG 379
Midterm EXAM
STUDY GUIDE
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Week 1
1/17 Intro to Course + GIS Overview
Fundamental Concept of GIS
GIS stores info as a collection of thematic layers that can be linked together by geography
Using GIS
Data Acquisition
o GPS + remote sensing
o Surveys
o Published data sets
o Creating data from other data w/in GIS
Data Storage
o Organization
o Efficient storage
o Easy backup
Data Management
o Tracking
o Indexing
o Metadata
Data Analysis
o Overlay different sorts of data
o Pattern analysis
o 3D analysis
Data representation
o Various ways to represent data
o Map layout + design
o Charts + tables
o Movies
In comparison to paper maps, GIS offers increased functionality in almost all 5 areas
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Week 2
1/22 Basics of GIS Data + ArcGIS
Popular GIS Programs
ArcGIS
QGIS
MapWindow
GRASS GIS
ILWIS GIS
Cloud GIS
Web Map servers
Spatial database management systems
Software development frameworks
Components of ArcGIS
ArcMap create + edit maps
ArcCatalog manage + create files
ArcToolbox contains analysis + data processing
Others ArcScene, ArcGlobe
ArcGIS File Structure
3 separated but related elements ArcMap, map document, data
Basic Components
o Map documents (MXDs) points to data files + saves map layout
o Shapefiles
File storing map features
Not a single file
Consists of at least 3 files: *.shp, *.shx, *.dbf
Can be saved in any folder, but not in geodatabase
o Geodatabases
Store maps in Feature Class Format
Can store different data types
Managing GIS Data
Always save map w/ relative path
Always copy/ share map w/ data
o Copy/ zip whole data w/ mxd file
Red exclamation sign on layers indicate missing link to data
o Fix it by changing data source
o Store map w/ relative path to avoid it
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Document Summary

Ilwis gis: cloud gis, web map servers, spatial database management systems, software development frameworks. Data in gis: all gis data types contain 2 distinct elements, spatial data a(cid:374)swe(cid:396)s (cid:862)whe(cid:396)e(cid:863) (cid:395)uestio(cid:374)s, attribute data answers all other questions. Images in arcgis = raster: raster data models entire surfaces, basic building blocks = cells, other names , grid, raster, digital elevation model (dem, aerial photography. Quantitative vs qualitative data: quantitative logical progression form low to high, ex population density, population, qualitative no ranking implied, differ only in type, ex tree species, points of interest. Limitations of geographic coordinates: calculating precise long/ lat not always easy, degree co(cid:374)sta(cid:374)t (cid:373)easure of dista(cid:374)ce. Map projection: translation of 3d sphere 2d map, goal is to perform translation while retaining useful geometric properties, shape, area, distance, direction. 2/14 vector data model & geometric representation. Vector data formats: 3 most popular formats: Relatively small, and still the most widely used format.

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