Questions tagged [topography]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
3 votes
1 answer
84 views

ETOPO1 region selection (in python)

I am trying to select a region in the Mediterranean Sea from the ETOPO1 data. ...
user avatar
  • 489
3 votes
0 answers
22 views

Topographic differencing using lidar

I have two lidar images which I want to use to do a topographic differencing. The two lidar images are of different spatial resolutions and are not co-registered. What is the best method to line the ...
user avatar
3 votes
1 answer
131 views

What are these 'spine' land features on the banks of the Oder river?

Looking around on Google Maps, one can zoom in on the banks of the Oder river between Germany and Poland and find quite an extensive series of curious repeating land features along much of the river ...
user avatar
6 votes
1 answer
241 views

Old topographic maps of Odisha, India

For my research related to coastal Odisha, India I am mapping the coastal boundary. I have downloaded available Landsat images which date back to 1972. But I want to map the same for before 1972. I am ...
user avatar
  • 113
2 votes
1 answer
219 views

What are the parallel horizontal lines on Google's satellite images? [duplicate]

On Google Earth I noticed many straight lines. While looking for answers for their existence, I came across this Quora answer, which provided a good response for why there are converging lines to ...
user avatar
1 vote
0 answers
52 views

Where can I find a list of mountain chains on the Earth?

I want to make an app for smartphones that lists the mountain chains of the world. Where can I find a list of all mountain chains that are presently outspread on the Earth?
user avatar
2 votes
1 answer
140 views

Complete missing outcrop problem

Given A is upper limit of sand stone, B is the lower limit of the planes that are equal in distance and dip. Dip angle is 29 degrees. Complete the outcrop of this map. —————————————————————————- Now I ...
user avatar
  • 121
1 vote
1 answer
65 views

Why are the south, the west and the north of the Caspian sea lush but its east completely dry?

About the Caspian sea area today: The south is very lush with the subtropical forests of the Iranian provinces of Gilan, Mazandaran and Golestan (although less "tropical" in Golestan) The ...
user avatar
4 votes
1 answer
342 views

What does the term "topology" mean in geology?

What does the term "topology" mean in geological sciences? Is there an agreed upon distinction between the two terms "topography" and "topology"? When trying to answer ...
user avatar
3 votes
0 answers
71 views

How are mGal-smooth free-air gravity anomaly measurements made exactly? (tiny variations of acceleration on a bumpy airplane ride)

Free-air gravity anomaly measurements from Operation Icebridge aircraft are described in A fault-bounded palaeo-lake basin preserved beneath the Greenland Ice Sheet (open access). Question: These ...
user avatar
  • 6,996
3 votes
1 answer
101 views

Calculation of river width in relation to contributing area

I'm looking for a mathematical method to estimate the river width based on the basic topographic information of the specific sections of stream under consideration. Is there a formula to estimate the ...
user avatar
  • 1,258
9 votes
1 answer
253 views

What causes the "ripples" that extend east-west along the mid-atlantic ridge?

Below are two cropped screenshots from the super-cool video Draining Earth's oceans, revealing the two-thirds of Earth's surface we don't get to see with the oceans "drained" to 4000 and 5000 meters ...
user avatar
  • 6,996
7 votes
1 answer
205 views

Public sources of topographical data of Earth?

I would like to find sources of topographical data for Earth's surface. I've looked in GIS SE and Open Data SE but haven't found a good answer to this so I though I'd ask here in Earth Science. Are ...
user avatar
  • 6,996
1 vote
0 answers
50 views

Topography and flash flooding

I'm looking for a study or document showing the effect of the topography, slopes, the sea level and the tide on flash flooding occurrence. Thanks in advance
user avatar
  • 31
3 votes
0 answers
272 views

How to plot orography for vertical profile of a certain variable along pressure levels in GRADS

I am using GRADS (1, 2, 3) to plot ERA reanalysis relative humidity profile for latitudinal average of 15N to 37N, and along the longitude from 40E to 130E. The orography is quite obvious and thus ...
user avatar
  • 158
7 votes
1 answer
3k views

If ALL the ice melted, what percentage of the Earth's surface would be water?

At the present time, about 70% of the earth's surface is liquid water (perhaps that includes floating ice around Antarctica, and the Arctic Ice cap). What percentage of the Earth's surface would be ...
user avatar
6 votes
1 answer
687 views

How is Karst topography formed on land?

I read that the source of Karst topography is coral reefs, when coral reefs are found in water bodies, how is karst topography formed on land?
user avatar
  • 133
1 vote
0 answers
30 views

Is there a formally-defined converse of a Prominence Walk?

My question was inspired by this one - in particular, the subtopic of pumping water from the ocean to the below-sea-level basins to deal with rising sea levels (spoiler: it's horribly infeasible and ...
user avatar
  • 327
9 votes
1 answer
402 views

Is there a special name for along-course elevation profiles of rivers, and where you can you find them?

Was discussing the terrain and rivers of Europe today with my father and it became apparent that a graph of the elevation versus course of a river would offer interesting insight, including a quick ...
user avatar
3 votes
2 answers
375 views

What processes created these apparent topographical anomalies in North California?

In the attached topographical map, you can see some strong topographic features in Northern California — elongated foothills below Mt. Tamalpais. You can also see, circled, some apparent anomalies. ...
user avatar
  • 333
8 votes
1 answer
7k views

What's the difference between topography and orography?

Both seem to be a study of a planet's surface. Topography seems to have more to do with the graphical depiction of surface features, but there seems to be a lot of overlap...
user avatar
  • 5,327
7 votes
2 answers
563 views

Details on Ocean floor

Taking for example the attached image, when looking at the ocean floor, there appears to be areas (strips, some of which I have drawn red lines by) of greater detail. Is this accurate detail? From ...
user avatar
4 votes
2 answers
1k views

Topographic Maps

I have a question about a project I have for school. I have to make a topographic map of a made up island. I was wondering if the placement of the contour lines and the index lines are correct. Also ...
user avatar
  • 49
10 votes
3 answers
577 views

Why is the elevation of the Iberian Peninsula so high?

The Iberian peninsula lies more than 600 m above sea level, on average, far above similar geological regions in western Europe. Even tectonically undeformed areas in the inner basins present a ...
user avatar
  • 1,663
11 votes
2 answers
758 views

What are the striations or ridges in the eastern Pacific Ocean?

Messing around on Google Earth recently I noticed a number of striations in the Eastern Pacific. These appear in an East-West orientation and seem to start on the North and South American continental ...
user avatar
3 votes
1 answer
4k views

Why does Google maps (in terrain mode) space thier topo lines 80 feet apart?

Is 80 feet some sort of standard?
user avatar
  • 31
10 votes
1 answer
799 views

Does bathymetry affect ocean topography/height?

Here is a map of ocean surface height or topography: Source: http://www.esa.int/var/esa/storage/images/esa_multimedia/images/2010/12/mean_dynamic_topography_of_global_ocean/9930795-2-eng-GB/...
user avatar
  • 1,811
12 votes
1 answer
803 views

What are the non-anthropogenic causes of The Netherlands' low elevation?

A large area of The Netherlands is below sea level. There are two non-anthropogenic reasons that I can think of: Compaction of delta sediments that lie below the country, A side effect of the ...
user avatar
  • 22.2k
12 votes
4 answers
2k views

Would it be geographically feasible to store water on land to counteract sea level rise?

Based on a misunderstanding of another post, I prepared an estimate of how much water would be required to lower sea level by one meter. the main question would be: could this be stored on land?
user avatar
41 votes
2 answers
7k views

Farthest point from the center of the Earth

At first glance, this seems like such a simple question of "What's the highest point on Earth". However, I also know that the Earth isn't perfectly round. So that "highest point" may be in a ...
user avatar
  • 2,698
9 votes
1 answer
985 views

What are the causes of lower UV radiation at lower elevations?

After recently visiting the Dead Sea in Israel and not getting any skin burns, I was wondering about the reasons for that. Searching the literature, it seems that the UV radiation is indeed lower in ...
user avatar
  • 22.2k
13 votes
2 answers
563 views

Determining the paleoelevation of mountain ranges

In New Delhi, a lot of people say that the Aravali range used to be as tall as the Himalayas. How do scientists know that some mountain range used to be a lot taller millions of years ago, and what ...
user avatar
  • 141