Test 1 Flashcards
Three properties of color
Hue, value, saturation
Three vector representations
Point, lines, polygons
Hue
What we colloquially refer to as color on a daily basis
Value
How light or dark a color hue is
Saturation
Refers to brightness of a hue
Primary colors
Red, green, blue
Secondary colors
Represent combinations of cyan magenta and yellow
Tertiary colors
Colors that fall between primary and secondary on the color wheel
Achromatic
Grayscale colors
Analogous colors
Colors that are found next to each other on the color wheel
Cymk color model
Cyan magenta yellow black color model
Is used on paper and is subtractive
RGB”A”
Alpha
This makes the color transparent based on 0-100 scale
Decimal vs hexadecimal
Decimal portrays value from 0-255
Hexidecimal: FFFF00
Gui
Graphic user interface
Hci
Human computer interaction
Wimp model
Windows, icons, menus, pointer
Visual hierarchy
5 category system developed by Borden dent to help prioritize features and organize maps effectively.
Chrome
The task bar at the top of the browser containing tools and widgets
Screen real estate
How much space you have to work with on a given device
Screen resolution
How many verticle columns and horizontal rows of pixels a screen can show
Ppi
How many pixels are shown in a line 1 inch in length
Two types of layouts
Fluid and compartmentalized
Raster maps
Represented by a grid of pixels
gif
Graphic interchange format
Vector map
Vector format defines a graphic with coordinates
Ajax
Asynchronous JavaScript and XML
Maintains a continuous communication with server. Helps with zooming and panning.
Tile imaging
Sometimes maps are too big and large files are slow, so they send bits of info from server to computer which is faster
Terra nulius
Meaning no space or void space on a map
What is a mental map? 5 elements that make it up
Paths, landmarks, nodes, districts, edges
Egocentric vs geocentric
Egocentric mapping is placing your knowledge and location as the centerpiece of the map
Reference map
Multiple sources of data used for a reference
Thematic map
Special purpose/ single topic or statistical
Thematic maps show the spatial distribution of a particular phenomenon
Chloropleth map
Data shown on enumeration units such as counties states etc
Flow map
Shows linear movement between places
Dot density map
Show variations in spatial density
Proportional symbol map
Usually circles or other shapes and are scaled to value points
Isarithmic
Maps continuous volumes such as elevation, temperature or precipitation
Isolines
Lines similar to contour lines that connect points of equal value
P2P
Peer to peer; sharing economy
Cascading style sheets
A separate “language” of code imbedded within html that gives styling directions to the computer
OGC
Open geospatial consortium; a set standard for content and data sharing
SVG
Scale vector graphic
Qualitative schemes
Colors used to display separate information such as race, colors should be neutral to each other and not related in scale or shade
Divergent schemes
Blue would be negative values or values lower than normal and zero or insignificant would be white, opposite end would be red shades
Sequential schemes
Used to display one theme in quantitative data in scale with one color or hue set
Color blind bad colors
Red and green
Gestalt effect/theory
The human mind can’t discern more than 5 colors and is effected by shapes and overlaps
Visual center
5 degrees above geometric center
Grid symmetry
Method to establish good sight lines to make map easier to organize and understand
Incongruent space
Type of space that does not match our preconceived notion of geographic order based on cities in regions of the same Cardinal direction
Natural breaks
Arc maps default that identifies gaps in data and assigns breaks accordingly
GML
Geographic markup language;
Modeling language and interchange format
XML
Extensible markup language; a set of rules for encoding documents and files
