Define and give an example of an equal-area map projection.
Re: GeoLogic Mapping C
Posted: October 27th, 2020, 12:20 am
by freed2003
An equal-area map projection is one that preserves the area of the region as it is on the earth but sacrificing the shape or angle of the region. An example is the Hammer projection
An equal-area map projection is one that preserves the area of the region as it is on the earth but sacrificing the shape or angle of the region. An example is the Hammer projection
Yep!
Equal-area maps don't preserve the exact area of the region (because then the map would be huuuge). Areas are preserved divided by a scale factor specific to the map.
Your turn!
Re: GeoLogic Mapping C
Posted: October 28th, 2020, 1:28 am
by freed2003
nah that's not nitpicky i looked back and I worded it weird lol.
On a topographic map, what way do the contour lines point when crossing a stream?
Re: GeoLogic Mapping C
Posted: October 29th, 2020, 7:06 am
by UTF-8 U+6211 U+662F
freed2003 wrote: ↑October 28th, 2020, 1:28 am
nah that's not nitpicky i looked back and I worded it weird lol.
On a topographic map, what way do the contour lines point when crossing a stream?
freed2003 wrote: ↑October 28th, 2020, 1:28 am
nah that's not nitpicky i looked back and I worded it weird lol.
On a topographic map, what way do the contour lines point when crossing a stream?
They are shaped like Vs pointing upstream?
Yess
Re: GeoLogic Mapping C
Posted: October 29th, 2020, 6:58 pm
by UTF-8 U+6211 U+662F
How do you calculate the gradient on a topo map?
Re: GeoLogic Mapping C
Posted: October 29th, 2020, 7:05 pm
by HugoTroop
UTF-8 U+6211 U+662F wrote: ↑October 29th, 2020, 6:58 pm
How do you calculate the gradient on a topo map?
Measure the distance between two locations on the map where you wish to find the average gradient. Use the map scale to convert this to actual distance. Next, determine the elevation change based on the contour lines. You now have the rise and the run, and dividing them will give you gradient.
UTF-8 U+6211 U+662F wrote: ↑October 29th, 2020, 6:58 pm
How do you calculate the gradient on a topo map?
Measure the distance between two locations on the map where you wish to find the average gradient. Use the map scale to convert this to actual distance. Next, determine the elevation change based on the contour lines. You now have the rise and the run, and dividing them will give you gradient.