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You are given the following information on a 1 arc-second (30-meter) DEM: How ma

ID: 234356 • Letter: Y

Question

You are given the following information on a 1 arc-second (30-meter) DEM:

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?

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?

Explanation / Answer

If a DEM has 1 arc-second (30 meter) grid and with following UTM Coordinates

UTM coordinates in meters at the lower-left corner: 560635, 4816399

UTM coordinates in meters at the upper-right corner: 570595, 4830380

Then,

The DEM has 466 rows

The DEM has 332 columns

The UTM coordinates at the Center of the (row 1, column 1 ) cell are

565617                   4823389

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