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ArcGIS Pro Review 2 Exam Questions and Answers
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ArcGIS Pro Review 2 Exam Questions and Answers
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ArcGIS Pro Review 2 Exam Questionsand Answers
Vector Data Model - Answers -TINs: Triangulated Irregular Network; Series of triangles,
each has constant gradient.
3D vector data - Answers -Flat: fewer, large triangles
Steep: more, small triangles
TINs consist of - Answers -Points, lines, polygons
TINs: Geometric Objects - Answers -Triangles - faces
Points - nodes
Lines - edges
Raster data storage - Answers -Arrays are a computers best friend
-compression
Grid of cells/pixels
-row, column
-Attribute data (quantitative)
Raster Information - Answers -All rasters have:
-number of columns and rows (integers)
-cell size (resolution)
-type (integer, floating point precision)
-extent - lower left coordinates (x,y) or Top, Bottom, Right, and Left coordinates
Raster Data Model - Answers -A raster is a cell-based data structure composed of rows
and columns for storing images
-cells are square
-cells are homogenous
-cells are also called 'pixels'
-cells are all same size (resolution)
Raster Data Storage - Answers -Stores attribute values can represent quantities or
qualities
Raster Data Model Elements - Answers -Cell values
Cell size
Bands
Spatial reference
, Raster Data Model: Cell Value - Answers -Integer, Float, NoData, etc.
Raster Data Storage: Cell Size - Answers -Cell Size (spatial resolution)
Cell size=length of one side of a cell in the real world
Higher (finer) vs. lower (coarser) spatial resolution
Spatial Resolution - Answers -Resolution=Size of each cell
-Ex. 10m res. Means each cell represents a 10x10m square of the earth
Raster Data Model: Bands - Answers -Think of a stack
RGB- digital cameras
Multi-band
Mixed Pixel Problem - Answers -In remote sensing, a pixel whose digital number
represents the average of several spectral classes within the area that it covers on the
ground, each emitted or reflected by a different type of material. Mixed pixels are
common along the edges of features.
Raster Data Model: Spatial Reference - Answers -Bottom-left Cell is start point
Referenced by center of cell
Inherent location
Raster Data Model: Types of datasets - Answers --Satellite Imagery: Landsat, MODIS
-Aerial Imagery: Aircraft, USVs
-DEMs: USGS, LiDAR
-Land Cover: MRLC:NLCD(prod w satellite imagery)
-scanned files (old maps)
Raster Data Model: File types - Answers -IMG, JPEG2000, ArcGIS grid, SID, TIFF,
many more
Raster Data Model: Structure - Answers -Cell-by-Cell encoding
-encodes as full matrix
-best for unique values
Multi-band
Run-length Encoding
-many redundant cell values
-stored by row and group
—group->adjacent cells by row
-Encodes and compressed
Quad Tree
-Hierarchy of quadrants
-recursive decomposition
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