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Questions tagged [geography]

For questions that are concerned with or nested within the field of Geography; the study of lands, their features, and the relationships and complexities between and among peoples, the physical environment, and ecosystems.

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4 votes
1 answer
886 views

Can I regard the grayscale of a RGB color image as a panchromatic image?

Here I have a remote sensing dataset with many bands (e.g., blue, green, red, ...), and I use the blue, green and red bands to get a true color image. I want to know if I can get a panchromatic band ...
tunar's user avatar
  • 331
4 votes
1 answer
96 views

What was the size of the Aral sea in year 1000 CE?

I understand that since the rise of the Soviet Union the Aral sea has dried up more and more due to irrigation from rivers diverting its water to other areas for the sake of agriculture. But is it ...
timesharer's user avatar
3 votes
1 answer
709 views

How to properly distinguish a transversal valley from a longitudinal valley?

I'm confused about how to distinguish the two. Prior to making this question. I've read the wikipedia entry on the subject but it mentions that for example a transverse valley makes 90 degrees with ...
Chris Steinbeck Bell's user avatar
1 vote
3 answers
206 views

How do we know the Arctic is just ice?

If I look at an Earth's map, the Arctic/North Pole always appears just like water. Evidently this is actually covered by ice, with an area depending on the time of the year. If this area is bigger ...
FriendlyLagrangian's user avatar
11 votes
10 answers
2k views

Other than tectonic activity, what can reshape a world's surface?

Take our world and look at its surface geography: we have continents and oceans, mountains ridges and canyons, and so on. To my knowledge, most of it has been shaped by tectonic activity (feel free to ...
Mr_Bober's user avatar
  • 218
4 votes
0 answers
122 views

Why does the Prime Meridian line shift in Google Earth when panning?

I'm not asking about the history of the line, nor am I asking about the tectonic plates underneath. If you look at the gif below, you will see that when panning very close to the earth on Google Earth,...
Dave's user avatar
  • 141
1 vote
1 answer
54 views

Terracing in Mahad

my first time here! I was going down the rabbit hole after watching a video on YouTube that made me want to read about it on Wikipedia. It led me to this Picture: (View from Varandha Pass near Mahad ...
Cryogen's user avatar
  • 113
2 votes
2 answers
2k views

Why is the weather in San Francisco so different from that in San Jose?

San Francisco has around 5 months a year of intermittent rain. San Jose, just 50 miles south and nestled between mountains instead of between waters, has perhaps only 1 month of rain. San Francisco ...
TheEnvironmentalist's user avatar
4 votes
0 answers
58 views

How would you predict the future climate with only 7 years of interest?

In my specific case, I have worked with a data set from 2001 to 2018 which had to be split up in 2012 due to major updates in the data. Therefore, I am now dealing with a data set of 12 years (2001 to ...
Thomas's user avatar
  • 141
1 vote
0 answers
37 views

Structural geology

Map 4 shows two dykes that have been offset by a vertical fault. In different coloured pencils, draw strike lines on each dyke. (a) On a blank sheet of paper, use the strike lines that you have drawn ...
user21331's user avatar
1 vote
1 answer
66 views

How are tall cays formed?

From reading about Cays on Wikipedia it seems they are formed from coral reefs covered with sand or gravel. There are however some cays scattered around the world which are hundreds of feet off of ...
CoryG's user avatar
  • 121
1 vote
0 answers
15 views

SC7 and SC10 Lithology Classifications

I am looking for the full names of the lithology classifications SC7 and SC10. According to the FAO's guidelines for soil description SC3 e.g. refers to silt-, mud-, claystone. What do SC7 and SC10 ...
user's user avatar
  • 111
3 votes
2 answers
69 views

Resource for scientific maps?

I need an administrative division map of england for a motivation for some scientific workshop. I don't want to cite wikipedia for this. Sadly I can't find any official resources and I don't really ...
NoteMyQuestion's user avatar
7 votes
3 answers
329 views

Has Antarctica's coastline been completely mapped? (map discrepancies)

Looking at different world maps, I noticed that there is considerable variety in how the coastline of Antarctica is depicted (even when taking the different map projections into consideration). Are ...
user21059's user avatar
3 votes
0 answers
63 views

Looking for the climate classification for a particular climate

I'm looking for the climate classification among the many different climate classification systems covering my absolute favorite form of climate. If a classification for this doesn't exist, and you ...
TheEnvironmentalist's user avatar
0 votes
1 answer
202 views

Why does Meteorology rely on a spherical model of the earth, rather than a flat earth, to function? [closed]

I hear all the arguments one explains to a flat earther as to why the earth is Spherical and not flat. I am not a meteorologist, but I know enough Meteorology for me to fly safely as a pilot. Getting ...
Daniel A's user avatar
1 vote
1 answer
122 views

Manmade ditches in lowlands of New England

Recently in travelling back to New England I discovered ditches in the lowlands/wetlands of the shoreline on Google Maps satellite view. They are clearly man-made, but even with all the agriculture ...
pbristow's user avatar
  • 113
35 votes
9 answers
12k views

Is there any river that does not discharge into larger body of water?

Do you know any example of a river that does not flow into sea or lake? For example, if water rises from the underground spring and forms a river but water vaporises in hot climate before it reaches ...
Hannelore Schmette's user avatar
3 votes
2 answers
172 views

Is Mississippi and parts of Alabama, Tennessee, and Kentucky one giant island? [closed]

Apologies if this is a poorly written question, I'm writing this on my phone. I noticed that there were a lot of rather long rivers in the region in question, and I began to wonder just how connected ...
Calvin Godfrey's user avatar
1 vote
0 answers
95 views

Why is Europe still considered a continent(along with Asia)? [closed]

It is true that there are multiple definitions of a continent. But it is also true that Europe fails to satisfy any of them. One of the boundaries between Europe and Asia was chose arbitrarily(the ...
Mr X's user avatar
  • 213
3 votes
0 answers
101 views

What were the Two Largest Forests of Western and Central Europe (circa 600 BC)

I am trying to find out what forests were the largest in Western and Central Europe, around 600 BC. I understand that accounts dating that far back may be difficult to find, but I hope other sciences ...
user20379's user avatar
3 votes
1 answer
158 views

Splitting the Earth's emerged land in two equal parts

Is there a meridian that has exactly as much emerged land area 180° on its East than 180° on its West (on the assumption that it could exist...)? If there is no meridian, is there any other great ...
xenoid's user avatar
  • 131
1 vote
0 answers
161 views

Which is the longest River in Germany and Russia?

Danube is 2850 km long and yet Rhine (1233 km) is considered the longest River in Germany. Likewise,the confusion between Yenisei and Volga in Russia.
Harveen Bhatia's user avatar
2 votes
1 answer
103 views

Storing borehole interval data (logs) in netcdf

I have a number of datasets that describe geological properties as intervals down a borehole (e.g. unit codes, sample results) In a database, or a flat ASCII file, I would describe these with a ...
alex_danielssen's user avatar
1 vote
1 answer
52 views

At what sea level would beach area be maximized?

If the sea level was 30000 feet, all land would be submerged and no beaches would exist. If the sea level was -30000 feet, no sea would exist and there would also be no beaches. The beach area ...
user19053's user avatar
6 votes
1 answer
134 views

How to interpret these kind of coordinates?

I am currently working on a project with my university and ran into trouble. I am building an application for indoor localization and am currently trying to benchmark our implementation. To do this I ...
Trup3s's user avatar
  • 141
1 vote
0 answers
77 views

Did people trigger the White Island 2019 eruption? [duplicate]

I am writing an essay about White Island’s 2019 eruption, and I need to know if the eruption was directly triggered by people. Is it possible that it was? Whether it being quarrying, too much tourism ...
Emily's user avatar
  • 11
13 votes
1 answer
3k views

Is Hudson Bay part of the Arctic or the Atlantic Ocean?

Years ago I learned that the Columbia ice field was North America's triple divide point: water flowing from this ice field could drain into the Artic, the Pacific, and the Atlantic Ocean. Something I ...
Jean-Marie Prival's user avatar
1 vote
1 answer
185 views

What is the origin of the River Citarum on Java, Indonesia?

The Citarum river seems to pass through Bandung. The Cikapundung River seems to empty into the Citarum, but this means Citarum starts somewhere else, right? I tried to follow it in a map. It seems to ...
Martin Thoma's user avatar
5 votes
1 answer
3k views

How much water will flow into the Caspian Sea if it is connected to the World Ocean?

I wonder how much benefit would a hydroelectrical project built on this inflow bring. There are projects to fill up the Erie, Salton, Qattara and the Dead Sea. But for the Caspian, there is only a ...
Timur Timak's user avatar
2 votes
2 answers
301 views

What is "sheltered site" (as opposed to "exposed site")?

What is "sheltered site" (as opposed to "exposed site")? It's used in context of location of trees in bumpy ground areas and weather damage.
mavavilj's user avatar
  • 143
24 votes
2 answers
8k views

How do oases form in the middle of the desert?

I am wondering if there are any theories about the formation of oases, and I am also curious about why an oasis can even last for a very long period of time. I have heard that fresh water exists on ...
C.Calvert's user avatar
  • 343
9 votes
4 answers
9k views

Is Australia the largest island?

I had participated in a quiz recently and one of the questions was 'which is the largest island in the world?'. I wrote Australia as the answer remembering that it was the 5th largest country in the ...
Schwarz Kugelblitz's user avatar
2 votes
4 answers
223 views

Is Oregon lake extremely pure water? If so, why?

My question is, Is the lake shown in the YouTube video Clear Lake, Oregon extremely pure water by volume not counting dissolved air which might be about 1 in 20 by volume? In case you didn't ...
Timothy's user avatar
  • 318
1 vote
0 answers
153 views

What is the Offset Corner Latitude and Longtitude?

I tried to understand about Offset Corner Latitude Point 1,2,3,4 and Offset Corner Longitude Point 1,2,3,4. But I couldn't understand what is it? For example, I have the Frame center Latitude and ...
HSD's user avatar
  • 11
6 votes
2 answers
149 views

Is there any possible way that a tropical cyclone of any strength could form over land?

Most tropical cyclones rapidly weaken over land, however, given some conditions (such as very wet soil/ground cover and tropical lower atmospheric conditions) they can sustain themselves or even ...
Grant Hartlage's user avatar
6 votes
2 answers
2k views

What is the most optimal latitude on Earth for the generation of extreme maximum temperatures?

First question on this StackExchange, so here goes... Overall, reaching high temperatures is dependent on 2 factors: The (maximum) solar angle in the day. The greater the solar angle, the more ...
Grant Hartlage's user avatar
3 votes
0 answers
34 views

What is the meaning of nomalized difference Built-up index?

I know how to calculate it by remote sensing image, but why do we define this? What can we know about a remote sensing scene by this indicator? What's the connection between normalized difference ...
Cc11111's user avatar
  • 31
5 votes
5 answers
592 views

What is this geomorphological form?

What is this geomorphological form located at Vitrolles, France? And how is it formed? It is like a 'raised flat land', or a base of a hill where the top 80% is cut, leaving only the wide, flat base.
tkokasih's user avatar
  • 151
3 votes
0 answers
52 views

How does jetstreams lead to formation of heat waves in Europe?

Jetstreams move at an altitude of roughly 6-9km above the sea level. Since, it is moving at such a great altitude how could it have possible impacts on the land? And how will jetstreams that flow at ...
William Gilbert's user avatar
4 votes
2 answers
384 views

How far above sea level can you get on the equator?

Quite simply what is the highest point above sea level that is right on the equator, I figured it would be a mountain in the Ecuadorian Andes but the Kenyan highlands look to be a likely candidate as ...
Ash's user avatar
  • 4,550
1 vote
1 answer
537 views

What is the significance of amphidromic points related to tides?

On reading about tide formation and the role of moon's gravitational force, I came across the term amphidromic point. Could someone please elaborate this concept?
William Gilbert's user avatar
26 votes
2 answers
11k views

What is the line crossing the Pacific Ocean that is shown on maps?

The picture below shows an imaginary line on the globe which crosses the Pacific Ocean and works as a rough separator of the Eastern and Western hemispheres. What is this line called in English? I'm ...
Igor Soloydenko's user avatar
9 votes
2 answers
817 views

Is there a hemisphere where there's more land than ocean?

From a previous question, around 40% of the northern hemisphere is land. Would there be a plane splitting the earth into two equal parts, where in one part there are more land than ocean?
arax's user avatar
  • 223
1 vote
0 answers
30 views

A few questions about the morphology and sediment dynamics of Wissant Bay (France)

Could someone please explain what exactly is shown on the following image? I have a few questions such as: How did the 'Banc à la Ligne' come about? (I know it has something to do with the fact that ...
Tine's user avatar
  • 11
1 vote
1 answer
2k views

Peninsula vs Cape [closed]

I know that Peninsula is much larger than a cape, but is there a definite way to differentiate them? I.e. by area- if the total area is larger than 30 sqkm, any headland is classified as peninsula..
David's user avatar
  • 75
3 votes
0 answers
28 views

Is there any downscaled income data for representative concentrations pathways?

I know that downscaled income data existed for The Special Report on Emissions Scenarios (SRES) Scenarios for IPCC's climate change scenarios. (http://ciesin.columbia.edu/datasets/downscaled/) For ...
justiny's user avatar
  • 31
3 votes
1 answer
377 views

Great circle in UTM coordinates

I've got a question about calculation of great circles in Cartesian coordinates: Is it possible to compute points along a great circle in UTM coordinates, i.e. given two points P1(easting1, northing1)...
bweise's user avatar
  • 31
2 votes
2 answers
108k views

What are the farthest Time Zone locations? [closed]

What place in the world has the farthest time zone? I heard it was Kiribati but then I found that Apia (Samoa) is further. So, is there anyplace that is the farthest in time than these two? What about ...
ekcs's user avatar
  • 47
2 votes
2 answers
199 views

Data for plotting tephigrams

I want to plot some tephigrams. Where can I find pressure, temperature and dewpoint data in text format?
Kishore Saldanha's user avatar