Map Reading, Spatial Data and GIS Flashcards
What is the act of interpreting or understanding the geographic information portrayed on a map?
Map Reading
What is the importance of map?
- Give accurate information.
- More and more necessary to rely upon maps
- By necessity, planning must be done on maps
- Adequate supply of maps
What are the categories of maps?
According to scale & According to types
It is expressed as a fraction and gives the ratio of the map distance to the ground distance (small, medium, and large scales).
Scale
The marginal information consists of…
Sheet Number, Series Name, Scale, Serial Number, Edition Number, Index to Boundaries
What is a type of map that provides a detailed description or representation of the natural and artificial features of an area?
Topographic Map
What is the type of map that shows height that you can measure contains contour intervals and elevations?
Topographic Map
What is a line joining points of equal elevation on a surface?
Contour lines
What is the distance between contour lines?
Contour interval
Contour lines are a dimension for establishing position in the vertical dimension, referred to as…
Relief
What are the five major terrain relief features?
Ridge, Hill, Saddle, Valley & Depression
What are the three minor terrain relief features?
Spur, Draw & Cliff
What are the two supplemental terrain features?
Cut & Fill
What is the upright cement poles (usually yellow) at the side of the road that have numbers and letters written on them?
Kilometer markers
It is represented by contour lines; interconnected points of equal elevation above mean sea level.
Relief
The water bodies in ground features
Hydrography
The artificial features: roads, airports, urban development, and buildings in ground features
Culture
What is the color of vegetation or wooded areas in ground features legend?
Green
What is the color of the water bodies in ground features legend?
Blue
What is the color of the cultural features (built-up areas, houses) in ground features legend?
Black
What is the color of the roads in ground features legend?
Light brown
What is the color of the contour lines in ground features legend?
Dark brown
What is the color of boundaries between or among administrative or political unit in ground features legend?
Red broken lines
A map that contains information about terrains.
Topographic map
What indicates steepness and shape of the ground? It is represented by contour line.
Terrain
What is the primary lines with heavier or thicker marks and labeled with a number?
index contour line
What is the thinner lines in between index contour lines?
intermediate contour line
What is used to portray significant relief on sharp summits or isolated tops and slopes in flat areas, represented by dashed or dotted lines?
supplementary contour line
Analyzing, interpreting, and visualizing spatial data that turns into evidence.
Geographic Information
What is the information linked to the geographic features (spatial data) that describe features. Associated with a point, line, or polygon elements in a GIS.
Attributes Data
What are the examples of Attributes data?
Street name, Population, Household income & Location of service facilities
It is made up of pixels or grid cells associated with a value or a class. The format of this is jpeg, png, tiff, bmp.
Raster Image
It comprises of vertices and paths.
Vector Image
What is a format of vector image that is often used in Google Earth or other web GIS programs?
KML, KMZ
What is a format of vector image which is a standard file format that contains only a single data set?
SHAPE FILE (.shp)
What is a format of vector image that contains multiple datasets simultaneously?
GEODATABASE (.gdb)
It is a system that creates, manages, analyzes, and maps all types of data. It connects data to a map, integrating location data (where things are) with all types of descriptive information (what things are like there).
Geographic Information System
What does GIS allows us to do?
Break the real world into layers
How is GIS used?
Identify problems, Manage and respond to events, Set priorities, Monitor changes, Perform forecasting & Understand trends
