Along what axis do all maps exist? Fill in the two boxes below.
All maps exist on the line of visualization and communication
•What is Vector data comprised of?
•What is Raster data comprised of?
•Vector - Points, lines, polygons
•Raster - Pixels
•What tool is this map displaying?
•Tissot’s Indicatrix!
•What specific type of Map is this?
• A Choropleth Map
•Name the identified Map Element
•Scale (Bar)
[---|---|------]
•True/False
▫Are maps 100% accurate?
•FALSE
▫Maps are representations of the real world and are a simplification of it. Things are omitted or emphasized at the cartographers discretion.
•What is Ordinal Data?
•Ordinal Data is ranked, but does not have equal spacing between items
•EX, my favorite pizza places in Ogden
•Name this Projection and the property it preserves and the property it distorts
•Mercator Projection
•Distorts: Area
•Preserves:Direction
Which map is a smaller scale?
It's Map B!
remember scale is a fraction, so
1:24000 is really 1/24000, which is
0.00004166666 OR 1 inch equals 2000 feet
and
1:250000 is really 1/250000
0.000004 or 1 inch equal 20833 feet
•Name two types of Orientation that can be added to a map
•North Arrows
•Graticules
•What is a Map?
•A map is a two-dimensional representation of the spatial distribution of phenomena or objects
• They are smaller than the area they represent and Most maps are flat
•Name a data source for a GIS
•Examples may vary….
GPS, Paper Maps, Remote Sensing, tables etc..
Name the three types of developable surfaces for projections
•Cylindrical
•Conic
•Planar
•How do Cartograms alter the way maps look?
•They alter map geography by changing the space shapes take up according to something other than area.
•True/False:
▫The pictured element is an inset map
•True:
•Smaller map included within context of larger map.
•Exists for few reasons:
1)Show primary map area
2)Enlarge congested areas
3)Show topics related to map’s theme
4)Show areas related to primary mapped area
•
•Why does Cartography Matter?
•Cartography matters because we are inundated with spatial data, and to make the best sense of that data, we need to see it effectively and efficiently.
•Why would you normalize population data?
1) When you just map counts of data, you end up with a map of the underlying population, and not much else.
2) If areas are not uniform in size, larger areas typically will have higher counts
Normalizing the counts reveals where the attribute you are mapping differs from the expected underlying population.
•Where are the places on any projection that has the least distortion?
•Lines of tangency,
•Points of tangency,
•Or…
•Standard Points and Lines
•
•Name an example of a continuous GIS dataset
•Name an example of a discrete GIS dataset
•Continuous – elevation/windspeed
•
•Discrete – roads/ political bounds
•Name the three different forms of scale that can be added to a map
•Representative Fraction - 1:24,000
•Bar Scale [--|--|------]
•Verbal Scale – one inch equals 2.5 miles
•What are the critical questions to ask about any map?
Why – Purpose?
Who – Audience?
What – Format?
•What is the difference between a feature class and a layer?
•A feature class is data, while a layer is a representation of that data in the map frame
•List the properties that projections can preserve or distort
USE THE DADS ACRONYMN
•D- Distance
•A – area
•D – Direction
•S – shape
•Name the dimensionality of the different vector data types
•Points = 0 dimensions – only location
•Lines = 1 dimensions – distance
•Areas = 2 dimensions – distance in x/y
•What is the name of the toolbar that you used in Lab 4 to move around on the paper page where you placed your map elements, zoom in/out etc.
Layout Toolbar