programming homework

darkangel615 · #1 24-Jan-2008, 10:12

I hate these freaking word problems! Can someone take a look and give me an idea on how to get started on this? Please?!

plab.cs.astate.edu/material/12011113894797815d783d3/findPosition.pdf

fakepoo · #2 24-Jan-2008, 11:45

Define your variables (things that you know):

Code:

Left:
x0 = 0
lon0 = -89.857178°

Right:
x1 = 511
lon1 = -89.835205°

Bottom:
y0 = 0
lat0 = 36.244273°

Top:
y1 = 511
lat1 = 36.261992°

Point:
xp = 382
yp = 387
lonp = ?
latp = ?

To find the X-coordinate (lonp):
1) Start by calculating the ratio of the coordinate with respect to the entire image. ( 0.0 for the very far left, 1.0 for the very far right ):

Code:

x_ratio = (xp-x0)/(x1-x0)

2) Then get lonp by:

Code:

x_ratio = (lonp-lon0)/(lon1-lon0)

Note that you know all of the variables except lonp so you should be able to solve for it using basic algebra skills.

I'll leave it to you to figure out how to calculate the latitude.

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programming homework

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