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QGIS Python (PyQGIS) - Loading and symbolizing raster layers

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Use the QGIS Python API to write a script that loads and creates custom symbology or symbolization for a raster layer.
Full PyQGIS Course: geospatialschool.com/courses/...
Code and instructions at: opensourceoptions.com/blog/lo...
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1 авг 2024

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Комментарии : 45

@sadiemoland2157 3 года назад

This is a great tutorial but does anyone know what the code would be to add gradient stops between the minimum and maximum values? I want to use equal intervals and have a specific number of classes.

@bhdotyeh 3 года назад

Hi - do you know how to use estimated (faster) accuracy when computing band min/max values as opposed to exact values?

@furkanyuce9107 3 года назад

Hay - I keep getting an error while opening the QGIS application. Error = utf-8 codec can't decode byte 0xfd in position 3: invalid start byte can you help?

@nicolerodriguezvargas223 4 года назад

Is it possible to make a code that interpolates some points and generate isolines? Thanks!

@annasam4461 Год назад

Hi, Is there anyway to create a raster attribute table using QGIS Python ?

@natanaellorenzi5 4 года назад

Hi dude. Thanks for this video. I have a question. Can i create a script to import csv and shp and automatically generate a layout with a pdf as output (print composer)?

@geospatialschool 4 года назад

Yes you can. I don't have a specific video on that, but this one will get you started.

@gunjankadam4944 10 месяцев назад

i want to use SCP, how can use it through script

@erichpurpur2550 5 лет назад

How does it work to shade a raster layer using the QgsPalettedRasterRenderer class?

@geospatialschool 5 лет назад

I haven't tried this yet. Here's a link to the Python documentation for the class as a place to start: qgis.org/pyqgis/3.2/core/other/QgsPalettedRasterRenderer.html I will add this to my list of videos and try to get a tutorial made in the next few weeks.

@kavitachaudhary2818 5 лет назад

dataprovider() showing error "AttributeError: 'NoneType' object has no attribute 'dataprovider'." Qgis version is 3.4.2. suggest a solution please.

@geospatialschool 5 лет назад

You probably need to use 'dataProvider()' instead of 'dataprovider()'.

@razvanafloarei6256 4 года назад

What have you imported at line 1: Fn='C:/temp/smr/trimmer_peak/dem/dem.tif'

@geospatialschool 4 года назад

This is the path to a raster file

@DanielCardin_ATX 5 лет назад

At 3:07, several extra lines of code appear and there's no reference in the dialog to them. Am I missing something?

@geospatialschool 5 лет назад

Sorry. That's my mistake. The code gets information from the file, gets the file name without the directory path or extension, and adds a raster layer the QGIS interface with the layer name the same as the file name. As long as you add this line of code you'll be okay: rlayer=iface.addRasterLayer(fn) where fn is the path to your raster layer.

@bluefoxtechnical5001 4 года назад

Hi, how can I visualise DEM with flood analysis.

@geospatialschool 4 года назад

What kind of flood analysis do you want to do?

@crtnnn Год назад

Page in the video description not found :(

@geospatialschool Год назад

I updated the description with new links

@lloydpal1542 8 месяцев назад

sir i have a error in this tutorial i wonder if you have the file in the .tif file base on the line 1 is not define please answer my problem thankyou

@geospatialschool 8 месяцев назад

You can download any .tif file and use it in place of the file I use in this tutorial

@lloydpal1542 8 месяцев назад

@@geospatialschool thanks sir

@piyaphatc5794 4 года назад

AttributeError: 'NoneType' object has no attribute 'dataProvider' , please guide me!

@piyaphatc5794 4 года назад

omg, I just fix it by myself

@piyaphatc5794 4 года назад

I wrote the wrong file name

@yunusemrekarpuz668 3 года назад

same, thanks :)

@IyadKhuder 4 года назад

Thanks a lot. It's great. Just if I could ask you to increase the font size of the code a bit in future videos, because it's too small for some viewers I guess (at least for me) thanks anyways :)

@dominikzaire3020 3 года назад

i guess it is pretty randomly asking but do anybody know a good website to watch new movies online?

@isaiahmarvin9492 3 года назад

@Dominik Zaire try Flixzone. Just search on google for it :)

@alivan7334 3 года назад

@Dominik Zaire i use flixzone. Just google for it =)

@leonleroy1291 3 года назад

@Dominik Zaire I watch on flixzone. Just search on google for it :)

@andrewjalen8727 3 года назад

@Dominik Zaire I watch on flixzone. You can find it by googling :)

@b.j2770 5 лет назад

where is the raster/file.tif file?. can i download?

@geospatialschool 5 лет назад

See this video for how to download your own DEM: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VlKkAYoNoRE.html

@jdaking7648 Год назад

Mine came out grayscale 🤷‍♂️

@adityaeaturu2058 5 лет назад

Which QGIS version are you using?

@geospatialschool 5 лет назад

In this video, I believe it's version 3.4. The lowest version it would be is 3.2.

@adityaeaturu2058 5 лет назад

@@geospatialschool Thanks! That was quick

@okerekechisom4985 9 месяцев назад

How can I Script showing the following with PyQGIS: 1. Number of polygons that have the selected leading species. 2. Minimum and maximum area of the stands that have the leading species. 3. The average of the leading species percentages within the stands. 4. The total area and average area of the stands, containing the leading species.

@isaacsilva2637 3 года назад

Can you make this in the new version please ?

@geospatialschool 3 года назад

This will work with any version of QGIS 3. Just tested it.

@vaibhavrajput8196 4 года назад

Join tables using PyQgis! please cover

@yassineghanou8210 3 года назад

if you found the way please help me

@thaooan1476 3 года назад

Python Console Use iface to access QGIS API interface or Type help(iface) for more info Security warning: typing commands from an untrusted source can harm your computer exec(open('E:/OneDrive - TVBC/0_Tài liệu/Python/Xử lý ảnh.py'.encode('utf-8')).read()) Traceback (most recent call last): File "C:\PROGRA~1\QGIS3~1.16\apps\Python37\lib\code.py", line 90, in runcode exec(code, self.locals) File "", line 1, in File "", line 11, in NameError: name 'Qcolor' is not defined