Mapping Technology Study Guide
#1
Global Positioning System
#6
Digitizing
All of the data used in computer mapping must be written in ________.
numbers
Aerial photographs
What two parts make up a GPS?
orbiting satellite and GPS receiver
#2
Surveying
#7
hardware and software
With digitizing, numbers are stored on a computer as a series of
0s and 1s
Pictures of Earth's surface, based on computer data, are called ______________.
Satellite images
THREE satellites
#3
Computers
Aerial Photographs
Each bit of a digitized image is called a ______.
pixel
By combining two aerial photos from slightly different angles, you can create a ______________.
three dimensional image
a GIS is a system of computer ________ and ________ used to produce interactive maps of many kinds.
hardware and software
#4
Global Positioning System
#9
satellite
Mapmakers determine distances and elevations using instruments and geometry by ___________.
surveying
As satellites orbit Earth, it collects and stores information about a portion of Earth's surface to create _____________.
images
data layers
#5
Pixels
#10
Data layers
___________ produce maps using data from many sources including satellites and aerial photographs.
Satellite images that appear red or green tells mapmakers that it is probably __________.
geographic data