Is there a way to organize point displacement to group points by category instead of having them random like in this screenshot? To make it more like a pie chart? Thanks

I'm working on a school remote sensing/ML project and I'm trying to figure out the best way to automatically download satellite imagery.

My goal is:

1. I have a geographic area/AOI ( a shapefile,list of coordinates)

2. I want Sentinel-2 imagery

3. I want to specify a date range

4. I want to filter by cloud cover ( if possible 0% )

5. Ideally I want one image every ~15 days (or another fixed interval)

6. I want the imagery downloaded automatically as GeoTIFFs

7. I eventually want to use the images in QGIS/Python for land-cover analysis and ML

I've figured out how to download the imagery manually, but I want to automate the data acquisition pipeline.

I've tried using Google Earth Engine and Python, and I found a GitHub project called EEDL(Earth Engine Downloader), but I'm having trouble getting the actual image downloads to work.

For people who have done this in actual projects: what workflow or tool do you use to automatically search for and download Sentinel-2 imagery for an AOI over a long time period?

I'm especially interested in working implementations using Google Earth Engine Python API, STAC, Sentinel Hub, Copernicus Data Space, etc., rather than manually downloading scenes.

If you have a GitHub repo, example project, or tool that does this, I'd really appreciate it.

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Does QGIS have a tool to make pie chart clusters like ArcGIS does? Thanks

hello guys,

I have been using QGIS sentinel plug in for a while and create a spesific configuration by using custom script of sentinel 2. however when I open it via software it doesnt work well. I cant see any differences with ordinary satellite image and ship detection script. Anyone who use this before? I am sharing relevant link above.

https://custom-scripts.sentinel-hub.com/custom-scripts/data-fusion/ship_detection_s1_s2/

Hi all,

I’m a new user, using qgis to match up aeronautical sectionals downloaded from the FAA - but I have 2 questions I’m hoping to get resolved…

The way the images are, there is extra data on the sectional images. When there is more than two together you can end up with data you don’t want layered where you don’t want it lol - is there a way on export to create a layered tiff? I was thinking I could then crop out the unwanted data from the appropriate layer after QGIS lined everything up.

Second question - when I do am export, it seems to only export what is in the active view - is there a way to select a region that fits within a given scale (1:500000) to export instead of it just exporting what is one the screen based on the specified scale?

hello again! qgis 3.44. My map grid shows 1°, 2°, 3° instead of the correct coordinates for my area. ive set the grid crs to EPSG: 4326, changed intervals, and set X/Y offset to the right values but nothing happens. The grid value always starts from 0°. How do I fix this?

Hi, lately its not possible to use openstreetmap basemaps if you want to export it as a webmap. You get an error code: -403r error-.

Instead I loaded over XYZ Tiles a basemap from openfreemap. with the link: https://tiles.openfreemap.org/natural_earth/ne2sr/{z}/{x}/{y}.png.

It worked. My problem is, the map is colorful but I want a black and white basemap. If I just do it in the color settings it won't translate the color settings when I export it as a web map.

I cant find a link to load the other openfreemap designs which are black and white. Do you know how to do this or how to load a black/white basemap fro another opensource map provider?

Solution for the people who are interested:

1. In QGIS, go to Plugins → Manage and Install Plugins and install the qgis2web plugin.
2. Under Browser → XYZ Tiles → Right-click → New Connection, create a new connection:
3. Name: OpenFreeMap
4. URL: https://tiles.openfreemap.org/natural_earth/ne2sr/{z}/{x}/{y}.png
5. Open Web → qgis2web → Create web map and select Leaflet at the bottom.
6. In the Layers and Groups tab, check the boxes next to OpenFreeMap Visible and BaseMap.
7. In the Export tab, under “Exporter,” select Export to folder, specify a folder, and then click Export.
8. In the export folder that was created, open the subfolder qgis2web_.... The index.html file is located there.
9. Right-click on index.html → Open with → Editor (e.g., Notepad).
10. In the editor, press Ctrl + F to search for “liberty.” You’ll see:
11. style: ‘https://tiles.openfreemap.org/styles/liberty’,
12. Replace “liberty” with “positron”:
13. style: ‘https://tiles.openfreemap.org/styles/positron’,
14. Save, then reopen the index.html file in your browser.

I was surprised to when my boss came up too me and posed a question I could noy answer. To why the pixels over a NDVI index on a satellite image is bad. At first I couldn't see a issue with that and I didn't see anything wrong with it, since we get it from a third party software solution company that specialize in satellite imagery. I can see that adjacent pixels have a different color meaning different index value as well. so one part of the field in the overlapping 10 x 10 m blocks are two different colors stacked over. I though about it and think that maybe what my boss is alluding too is a incorrect or discrepancy with that part of the farming block where those overlapping pixels lay. Now readings become unsure and data reliability can affect relationships. I don't see it as a big problem in the grand scheme of it all but maybe someone with GIS background can give some insight?

I download sentiel plug in and log in via my authentic id. however in qgis it does not work effectively. Satellite images are not working and I cant really track changes by time. Am I missing any points or this is how it works? is there any one more experienced and effectively use it and share any tips? thanks in advance.

I am trying to create a map in QGIS so I can make a Contiguous Cartogram. The original map was made in inkscape. It's just simplified geometric shapes. I don't have any real idea what I'm doing so I went online and tried to find instructions. as per what I found:

1. I saved it as a dxf file and imported it into QGIS

2. converted to Lines to polygons

3. deleted the original layer as that it wouldn't be needed

4. saved as gpkg

Now I have the image above. (somehow It set it to these Christmas light looking lines instead of the red they were.) The next step is to hit F6 and assign data to the objects but it says selected:0. If I click on a section before I hit F6 it just moves the image around but still says selected:0. If I try to type in something in the text column it stays but I have no idea if its the right space.

What do I not know?

hi im new to gis! what is the best way to restrict these division lines to only appear inside the current atlas feature?

the setup is that i have an atlas set up with a barangay boundary layer (green one) as my coverage layer. The Atlas zooms to each barangay correctly, and I have "Clip to atlas feature" turned on.

i also have a division line layer (puroks - neighborhood boundaries) that I want to only show up inside the green area (the current barangay chosen). Right now, the lines from neighboring barangays spill over into the map.

appreciate the help! version 3.44, windows 11

I have all of this overlapping data, which doesn't look good, and isn't very useful. I was wondering if it's possible to make this point data 3D? So, for example, the location where there are 42 data points would be 42 "units" tall, the 11 would be 11 tall, etc. If this is possible, does anyone know where I could find a tutorial on how to do it? I know there are other ways to map the data points than what I show here, but I thought the 3D would look cool. Thanks!

I

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I have a geopackage with every US county, and it has a lot of data in the attribute table (it is a map about US county agriculture production). There are many columns which range up to 100% which show what % of that county's fields produce a crop. I would like to create a symbology which has a different color for each crop, and which ever crop has the highest % in that county, it would be colored (a larger % in that county would also make the color darker). Is this possible with one symbology, or should I split up the counties based on an expression where each crop gets checked if it is greater than the other crops?

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I'm trying to make a custom projection to change the point where the map wraps around (so that the Westernmost area of Russia doesn't appear on the left side of the map) I tried changing the longitude in the projection, and it worked, but now I have these weird lines going across the screen that I assume are from bits of geometry wrapping around. Is there any way I can get rid of them?

Hi,

I downloaded a 1:10m world map from https://www.naturalearthdata.com/downloads/10m-raster-data/10m-cross-blend-hypso/, and when I zoom in it doesn't refresh, and looks very pixalated. It is a TIF file. I'm assuming it's not the map itself and is something within QGIS. If I add a basemap it refreshes with no problem. My resampling is set to nearest neighbor (have also tried Bilinear, which changed it from pixalated to smoother, but still blurry), the rendering checkbox at the bottom is checked, and based on a google search I built pyramids. Any help would be appreciated. Thanks.

I'm on Windows 10, QGIS 3.38.2-Grenoble. Only plugin of note is NextGIS QuickMapServices, which I used to get terrain maps.

I have a set of coordinates, which have elevation value I sampled from a DEM in the program. The elevation goes up to 3 decimals. These values do not include any unit.

My goal was to reduce the number of decimals to zero, and add unit of meters. That way I'd have a nice even height gradient.

My attempt went: In styling layout I reduced the number of decimals to zero. Then I used the expression builder to add a unit with "ele" || ' m'. Unfortunately it overrode the decimal placement setting.

Is there any combo of functions I could use to both add a unit, AND reduce the number to just whole meters?

How can I georeference a DWG/DXF file in QGIS?