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GIS I - Group H (Vector Data (x,y coordinates) (Geometry (Objects/Discrete…
GIS I - Group H
Vector Data (x,y coordinates)
Discrete Object View
Geometry
Objects/Discrete Features
Lines
EX: streets, rivers, etc
Polygons
EX: counties, national parks, etc
Points
EX: schools, buildings, etc
Topology
Adjacency
Connectivity
Containment
Data Structure
Georelational
Coverage
Shapefile
Object-oriented
Geodatabase
Attributes
Feature Behavior
CORRECTER
Raster Data (grid of cells)
Continuous Object View
Data types
Thematic
Categorical/Discrete (Integer)
Attribute Table
Continuous (Floating Point)
Image
Brightness values
Compression
Run-length encoding
Quad trees
Lossless
TIFF
.sid
.img
Lossy
.jpg
FASTER
Attributes
Feature Table
has a BLOB
Non-spatial Table
doesn't have a BLOB
Data types
Qualitative
Nominal
Ordinal
Quantitative
Interval
Ratio
Cyclical
Data Relationships
Join
1-1/many
Relate
many-many
GNSS
satellite segment
broadcast frequency
L1 (1575.42 MHz)
L2 (1227.6 MHz)
L5 (1176 MHz)
4 satellites for trilateration
PDOP
Differential GPS
CORS
WAAS
control segment
user segment
Map Design
Characteristics
Quantitative symbolization
Dot density
Choropleth
graduated colors
classes
Dasymetric map
Qualitative symbolization
linear features
flow map
network map
Isarithmic (contours)
Scale
Large-scale (small area)
Small-scale (large area)
Remote Sensing
Sensor Platforms
Airplanes
UAVs
Satellites
Polar orbit
Near-polar orbit
Geostationary orbit
Types of Resolution
Spatial
Spectral
Radiometric
Thermal