QGIS Contours and Contour Labels
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- Опубліковано 29 чер 2024
- Create topographic contours from a digital elevation model (DEM). This QGIS tutorial will cover how to create contours and customize the appearance of contour lines and labels. One common way to display contour maps is creating and labeling only index contours. This process may seem a little complicated, but can actually be done quite quickly. This video tutorial will show you how!
Step-by-step instructions for newer QGIS versions: opensourceoptions.com/blog/ho... - Наука та технологія
Thank you for this video, great step by step instructions.
Great video, I’m using this for compiling drone data contours onto the orthomosaic output. What a powerful tool.
Glad it was helpful!
Straightforward and well explained! Thank you so much!
You're very welcome!
I really appreciate this content. Thanks for helping us
Thanks, simple yet effective for a beginner.
Fantastic tutorial, and easy to follow too. It helped me to design a hiking trail for a signage in my city, and then exported them to Illustrator, many thanks for your help!
Glad it helped!
@@geospatialschool One year later, i've come back to watch your tutorial again, for a new map design, thanks again!
Very clean , very helpful! Thank you!
Just found what I was looking for. Thank you for the awesome tutorial.
You're welcome!
Great video! It would be great to see a tutorial on how to use the DEM to draw transects and label those with the slope.
This was HUGE! thank you for the explanation
You're very welcome!
WOW, thanks a lot ! .big hug from Cordoba Argentina
Thank you for the video , well explain for a beginner
You are welcome!
Amazing, I've been searching for this for a while, you saved me man, thanks!
Glad I could help!
Thx for the tutorial! While watching your first step I came up with a more simple but less elegant solution for the second step: I just made a second contour with a larger interval, thicker lines and labels.
Did the same thing; but cool to see the power of those expressions.
what a godlike tutorial TY
seriously. this is the most helpful of all the tutorials I watched! Thanks!
You're very welcome!
Yes me too
Hello, I just wanna ask why I cannot load the contour in raster? It is always invalid@@geospatialschool
Thank you. You are being very helpful.
Not quite what I needed, but obliquely helpful nonetheless. Thanks for taking the time to post these instructions.
Awesome video! I am using Reality Capture to make 3d models and DTM from my drone. That side works great.. I had problems with creating contour maps but this really cleared it up!... Thanks!
Glad it helped!
awesome explanation! Thank you! :)
Exactly what I was looking for!😁
Best tutorial, regards from Chile
Thank you!
very well explained.
You are a lifesaver.
nice video mate, lots of knowledge shared!
big shout oout froom brazil!
obrigado
Thanks for watching!
Thank you so much, very helpful :)
You're very welcome!
Thanks...Much appreciated
You're welcome!
thank you! very interesting
You are welcome!
So. Can it work with a scanning of the actual map you have made? I also want to make my own DEM, so I will now find a vid about that.
Wonderful tutorial, thank you! How can I go back and edit the initial index expression ?
I am having trouble using symbology by rule to identify peaks. Seems like the small length or lack of a higher valid integer contour line at peaks could be used with python. Maybe even the contour ID could be utilized.
So far I have this but isn't what I want
"elev" >= 500 AND length
Can we have a way to extract all Hills as points from a DEM File. I mean to say that i want to extract Centroid of all Highest Contours(representing Hill Tops).. Thank you so much
thanks for your videos sir n the explanation its quite clear , may i know how to made geograpich ( DMS, or (east "E", West "W", North "N", South "S") label grid in layout (at 'draw coordinates' dialog box). _sorry for my bad english_
Thank you, very useful. Can the file including the the labels of the 100m marks be exported to Google Earth?. Somehow labels are not exported when I try, If someone can help I appreciate.
How do you get that TIF picture? Wich video do you talking about? thanks!
Can you do a vid on Qfield and how its used and set up from within QGIS thx
Hello Dr. thank so much for your sharded. if i have contour Elevation from 16 to 26 meter. so how can i create label index?
Nice video , very helpful. I am trying to make a contour map using QGiS. The map contains a lot of trees and grass , so when I do the contour processing the output is very bad and confusing. Can you guide me through it?
I'm not sure how you are making a contour map of trees and grass. Generally contours are used for topography. If you need help on a specific task please use my business contact so we can discuss a contract.
Is there a way to colour the areas between two contour lines?
How are the ID applied to the contour lines? Is there a method that we could take advantage of?
Thank you for such an amazing video! But how can we export this file to dwg including the layers and elevation?
Select by Pressing Down the Shift key and while holding shift down key select the layers and then click export.After selecting layers they should be highlighted blue and stay that way.Hope it helps
Thanks for the videos. QGIS looks interesting. I was curious if there is a way to export clean vector contours out of QGIS into popular vector editing programs like Adobe Illustrator or Corel Draw? I want to use these lines in some future artwork pieces I'm working on.
I did a video on this a couple of days ago. Check it out!
@@geospatialschool Thanks! I'll definitely watch it tonight. I appreciate you sharing with all of us.
@@mohammeddhanish.k9192 It does it automatically when you reply to a comment. ;)
Nice tutorial but sadly it didn't work for me. All I got was the '100' line bolded.. no idea why. I then tried to learn how to use the AND operator (from a QGIS forum), but that didn't improve things.. any tips?
If using 2' contours, and you want to create 10' index intervals, would the expression be- if("ELEVATION"%10=0, 1, NULL) ? Thank you for you videos and work.
Nevermind! That expression worked for 2' contours with 10' indexes. high 5s!
How Can I export the contours to use them in a CAD-program ?
really thank you so much for this video i learned a lot and it's been a while i am searching for that i just have a question please, how can i keep like what you have elevation lines straight in low levels enclaves, i tries to simplify lines but not enough , i hope u answer my question if you understand what i mean
i know im asking randomly but does someone know a way to get back into an Instagram account??
I was stupid forgot the login password. I appreciate any tips you can give me.
@Holden Tatum Instablaster :)
@Cameron Jacob I really appreciate your reply. I found the site thru google and Im in the hacking process now.
I see it takes a while so I will get back to you later with my results.
@Cameron Jacob WTF IT REALLY WORKED! Just hacked my IG login within ~ 45 mins of using the site.
Just had to pay 15 $ but for sure worth the money :)
Thanks so much, you really help me out !
@Holden Tatum happy to help :D
This is a GREAT video! Thanks! Any idea why my topo lines appear directly above my heightmap, not 'over' it (or on top, as in your example)? I'm using a height map from a game engine terrain rather than 'real', if that makes a difference. I'm not sure how to get them aligned. Any ideas? Thanks again!
Not sure what you mean by 'above and not over'?
Open Source Options thanks for your reply. The lines in yours are drawn directly over the height map, as you’d want. But, in mine, they are actually flipped (mirrored vertically) and shifted up. Ie my map is 4096x4096, and so my topo lines are shifted exactly 4096 pixels in y, and mirrored. If this were photoshop, I’d just drag the topo lines down 4096 pixels and transform flip them and call it a day! But in qgis ... not sure what the issue is or how to fix it. :-/
I see. Not sure what the problem could be without seeing the data, but I'd guess something with the projection/CRS. If the end product you want is an image, then you can export the contours as a PNG and make the edit in photoshop.
Open Source Options thanks! I’ll give that a try!
Which sign is used for mendoring
Thank you for your video. I am trying to generate isocontours to specific elevation values (e.g., 100m or from 100m to 1000m with 100 m interval). How can I define the min and maximum values to generate the isolines? TIA
You can generate all the contours then select and delete elevations that fall outside the range in the attribute table.
@@geospatialschool thank you. It is a shame they removed the option of select the itnerval and range and I hope they put it back in the next version...
how can i add a grid coordinate or grid line to this contour
Pls explain how Can I get contours inside specific closed area (not entire area from DEM)?
Clip the DEM to the area of interest, then create the contours from the clipped DEM
@@geospatialschool can you please do a video on that? Thanks in advance.
how can i get the remainder symbol to be writen?
Hi Quick question is it possible to create a 3D contour map, that can be exported as a .dxf to import into CAD?
I'm not super familiar with CAD, but all the 3D data is there so it should be possible.
pls first tell us that how did u develop this DEM before contouring. I have successfully did geo-referencing and now want to do DEM and after that contouring withe the help of DEM. pls guide me
This video shows how to download elevation data (DEM): ua-cam.com/video/A57H_XVUy-4/v-deo.html
Having trouble getting my Index to come up with the value 1, they are all "NULL" even at intervals of 100...
Got it! Had to use "%" instead of "/"
I thought I had the same problem, but then I realised I only get "1" at ELEV 100. No idea why
Can you do a quick video on deleting contour lines over structures? Please and thank you sir
Can you be more specific? I'm not sure exactly what you mean.
@@geospatialschool Thanks, I figured it out, what I was looking for is how to remove the contour lines that appear over structures. I played around until I got it. Thank you for the quick response though, great video by the way!
Pls let me know how can I get contours of specific closed area not like in this video @Robert Nicholson.
Could you write down the expression, please?
It takes too much time to run the algorithm.why?how can i fix it?
Your DEM is probably quite large, or you are calculating the contours at a very close intervals. Use a smaller DEM or make the contour interval larger
Wow....it's contour line at textbook level. Thanks. How can I export this contour lines with labels into kmz file for Google Earth?
From QGIS you can just right click on the layer go to Export (or maybe Save As) and sav it as a kmz/kml