Exam 4: Raster Data Model

Explain run length code as a method for storing raster data.

You are given the following information on a 1 arc-second (30-meter) DEM: UTM coordinates in meters at the lower-left corner: 560635, 4816399 UTM coordinates in meters at the upper-right corner: 570595, 4830380 How many rows does the DEM have? How many columns does the DEM have? And, what are the UTM coordinates at the center of the (row 1, column 1) cell?

DEMs generated from LiDAR can represent different height levels.

If a raster has the cell resolution of 30 meters, then a cell in the raster measures ______ on the ground:

Define "vectorization" and "rasterization."

What is a digital orthophoto quad (DOQ)?

DEMs can be created from satellite images.

Explain the advantages and disadvantages of the raster data model vs. the vector data model.

Which of the following is an example of a multiband raster?

A higher cell depth (e.g., 16-bit) means that the cell can store more information than a lower cell depth (e.g., 8-bit).

A 16-bit raster can store a wider range of values than an 8-bit raster.