Mapwork Flashcards
What’s the formula for working out degrees/minutes/seconds?
(Cm of co-ord/total cm in 1’ or 1degree) x 60
What are signs that show the direction the river flows? (5)
Towards the sea
From higher altitude to lower altitude
Contours bend upstream
Dam wall is downstream
Tributaries join at an acute angle where they meet the river
What’s the formula for distance?
Map distance x scale / 100 000
What’s the formula for area?
Length x breadth
What’s the formula for gradient?
VI/HE
(Difference in height) / (Distance)
How should gradient always be represented?
As a ratio
No units needed
How do you work out magnetic bearing?
Geographic bearing + magnetic declination
What’s the formula for vertical exaggeration?
VS/HS
(Vertical scale/horizontal scale)
What are ways to prove seasonal rainfall?
Many dams
Furrows
Many non-perennial rivers
Wind pump
Reservoirs
What’s are reasons for cultivation of rows of trees? (3)
Wind breaks
Reduces soil erosion
Aesthetic
What’s the shape of rural settlements?
Linear
What are the street patterns? (3)
Radial concentric
Grid iron
Planned irregular
What are advantages of grid iron?
Easy to layout and subdivide
Easy to navigate
Oldest part of town
What’s a disadvantage of grid iron?
Causes traffic congestion because of all the intersections
How to prove farming is commercial?
Large area
Farm names
Dams
Irrigation
Farm boundaries
Identify dominant primary activity
Power supply
Mining
Farming
What are some examples of recreational activities?
Rifle range
Hiking
Picnics
Wine tasting
Fishing
What’s the definition of GIS?
A computer application that is used to store, view and analyse geographical information, especially maps.
What are sources of information of GIS?
Statistics
Topographical maps
Aerial photographs
GPS
Satellite images
Surveys
Reports
What are the components of GIS?
Hardware
Software
Data
People
Methods
What are some uses of GIS?
Produces maps for display and can show many different kinds of data on one map such as streets, buildings and vegetation.
Users can select information from layers of data
You can have as many layers as you have data layers
What are data layers
Map layers showing different types of information that are projected on top of one another.
What are examples of uses of GIS?
Used by farmers to match crops to soils
Used by businesses to plan the opening of new branches
The best locations for building schools
What are some examples of application of gis?
Infrastructure-the best area to build
Newspaper determine distribution areas
Retail companies find locations for new sites
Schools plan bus routes
Meteorologists- prepare weather forecasts
Disaster management - prepare for and manage natural disasters
What is remote sensing?
The science of acquiring information about the earths surface from a distance without being in direct contact with it.
What are some examples of remote sensing images?
Satellite images, aerial photographs, orthophotos
How might shops make use of gis?
Available plots
Cost of plots
Distance to other shops
Client base
Client buying habits
How would gis help flood
Relief (contours)
History
Rainfall figures
50 year flood line
Development above flood like
Residential areas affected
Evacuation routes
How would gis be used toward crime
Type
Location
Time
Frequency
Risk zones
