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Questions tagged [mapping]

The act or process of making a map.

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Create geospatial PDF in Python

I created a figure in Python with raster and vector data. I can save it to a PDF but I need to save it as a geospatial PDF with metadata like transform and PROJCS to open in apps like Avenza Maps. How ...
Mónica Álvarez's user avatar
-1 votes
1 answer
33 views

X,Y GIS coordinate to latitude and longitude [closed]

How do I convert ArcGIS X Y coordinates to latitude and longitude?
Melaku's user avatar
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7 views

Folium map not displayed in Safari

I have created a map with Folium in Python. It is displayed in Chrome. But Safari just shows the page in blank and the map is not displayed. The problem persists after removing markers and other ...
user241935's user avatar
-1 votes
1 answer
56 views

Link drive folder to gee: Display tiff images from drive to gee

I have classified images using many different programs on gee and exported a series of classified images to a folder on my drive. I don't know how I can link that folder to gee so I can display the ...
MNgoc's user avatar
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Mapping hourly image collection over feature collection with daily aggregation of image stats

I have a feature collection ~ 1600 polygons across the U.S. I have an image collection (NLDAS) where each image is hourly data for the summertime (92 days) across 3 decades ~ 24 hours x 92 days x 30 ...
Ufuoma Ovienmhada's user avatar
1 vote
0 answers
27 views

Fix view in QGIS

I have to generate multiple maps for weeks out of QGIS. The view section has to be always the same and I will have to switch off my computer for time to time. Is there a way to fix to a certain map ...
BAE_23's user avatar
  • 667
1 vote
1 answer
46 views

Is there a way to convert a map image layer to a .png/.jpeg file?

I am trying to host a map image layer (ArcGIS map service file) on an Amazon Web Service map. I want to reference this in an Amazon Location Services app that I'm creating for my coworkers. My theory ...
George's user avatar
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28 views

How to make DeckGL-like 3D columnLayer map at country level in QGIS or Illustrator?

I have data for a series of points around the continental U.S. Using deck.gl, I can turn this point data into a nice 3D ColumnLayer map. Now I'm trying to find a way to make a similar map, but for ...
Kirkman14's user avatar
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QGIS Layout - Map Frame shows only white and is not accessible

I created a working atlas series in the print composer. After some time the map frame is all white and showing no map, even with disabling the atlas preview. It's impossible to access the map frame ...
Martin Reger's user avatar
1 vote
1 answer
98 views

Cannot plot geometry on a CSV file (Python)

I'm trying to plot a data about Istanbul's metro lines. The actual data is in CSV format and all of the data is in string. The data is from Istanbul Metropolitan Municipality (https://data.ibb.gov.tr/...
Hilmi Emre's user avatar
-2 votes
1 answer
61 views

Why do only points appear when I load shapefiles into QGIS?

I was sent files in these formats : .cpg, .dbf, .prj, .sbn, .sbx, .shp, and .shx. I tried importing the zipped file containing all of them using Layer > Add Layer > Add Vector Layer and ...
Elyse's user avatar
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Spatial relationship between fast ice and frazil ice using heat maps

I used Google Earth Engine to create heat maps for both frazil ice frequency and fast ice frequency. This was done by classifying these ice types from MODIS images along the Victoria Land Coast in ...
Daniel's user avatar
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33 views

How to display on a final map the scale of a vector field marker?

I'm using the vector field marker to display earth deformation. For that, I defined the vector field marker with cartesian components (x (field_3) as displacement in West-East and y (field_4) as ...
user238085's user avatar
1 vote
1 answer
66 views

How to enable automatic georeferencing of hand drawn lines

Our company does a lot of bird surveys, we often need to draw flight patterns on a paper maps and convert these lines into shapefiles to create digital maps (e.g. of migration routes) for our reports. ...
chente's user avatar
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1 vote
1 answer
79 views

Transparent but outlined layer in Google Earth Engine

My original code creates red boxes over my study area: Map.addLayer(geometry, {color: 'FF0000'}); I would like for these boxes to have a transparent fill and clear borders. I have tried this based on ...
Macall Hock's user avatar
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17 views

Change the SRC of a Google map (quick map services)

I´m defining a watershed basin using QGIS. I have to migrate the data I collected on QGIS to a third part Application. All transfer of data is doing through DXF files. I use the quick map services to ...
Rabelo's user avatar
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1 vote
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159 views

Applying temporal water masks to temporal Landsat composites

My goal is to create monthly water masks using an NDWI index with Landsat. Additionally, the code should allow a user to select their own temporal window, but in this case the goal is monthly. In ...
pbaltezar's user avatar
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49 views

Drawing a polygon from UTM coordinates without using a computer

all. I'm having trouble remembering how I used to do something, and I can't find any answers so far online. Years ago, I would take various points of, say, a field using a handheld GPS. I would then ...
 Liston1664's user avatar
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48 views

New Zealand satellite imagery Google Earth Engine

I want to create a satellite image for all of New Zealand using 2020 Landsat 8 satellite imagery to then calculate NDVI to export into QGIS. I am wanting to compare to 1990 satellite imagery so want ...
Aimee Calkin's user avatar
1 vote
0 answers
21 views

How to remove Geonode Mapstore Viewer Plugins

I have been trying to remove the "Print" plugin from the map_viewer page by overriding the localConfig.json in the _geonode_config.html file.(See Attached). After I remove it, a couple of ...
David Tshamussa's user avatar
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1 answer
73 views

Layer Partly missing after zoom in the map and download from Google Earth Engine [closed]

I want to calculate DpRVIc (a kind of vegetation index) by using the Sentinel-1 data on Google Earth Engine. I successfully done my calculation and added the layer to the map on GEE website. However, ...
HsunHung Chu's user avatar
2 votes
1 answer
118 views

Basemap rotation - keeping labels facing down

I'm using QGIS Hannover 3.16.3. I often use Google basemap layers from the XYZ tiles. When rotating the maps the place names rotate with them. Is there a way of stopping this? Perhaps an alternative ...
Tom 's user avatar
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0 votes
1 answer
59 views

How to extract also a zip code with Overpass turbo?

I use this code in Overpass turbo: [out:csv(comune, ISTAT, name, highway, ::lat,::lon;false;";")][timeout:600]; //provincia da cui estrarre i dati area[boundary=administrative]["...
user236223's user avatar
2 votes
0 answers
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Completely new to GIS, how do I extract the pic of a certain elevation from the ETOPO .tiff file

So I started learning QGIS a week ago to do an alt-geo map and .tiff files from what I have read contain several image files displayed as 1. Is there a way for me to export specifically the PNG that ...
The Great One's user avatar
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0 answers
133 views

Speed up loading large GeoJSON layers to Leaflet map?

I have some GeoJSON data layers which I fetch their features from phpMyAdmin to display on a Leaflet map. But loading the features takes almost 10 seconds to be loaded. Have you any solution to speed ...
Solmaz's user avatar
  • 149
2 votes
1 answer
40 views

Some labels are not shown in a rotated atlas object (QGIS 3.28.8)

I have a problem that some labels from polygons are not shown in my atlas when the map is rotated. If I switch the map rotation off all labels are placed just fine. I created the atlas objects with ...
Martin's user avatar
  • 23
1 vote
1 answer
85 views

Making world map with terrain colours in QGIS

In QGIS I would like to create a world map that has terrain colours (e.g., deserts or vegetation), as in the attached map (Gehring et al. 2022), particularly for the African continent. How should I ...
Andrea Fontana's user avatar
0 votes
0 answers
23 views

QGIS Export Map to Image not to scale

When I do a Export Map to Image using QGIS then insert into C3D using Mapiinsert it does not come in to scale. I have successfully done this in the past so I'm not sure what is going on. Any ideas? ...
Sylvino's user avatar
  • 105
1 vote
0 answers
35 views

How to automate the design and production of 5 thematic maps in a single layout in QGIS

I am currently working on a project to map cleanliness incidents in all 19 boroughs of the City of Montreal. I must represent 5 variables out of 7 of the top 5 cleanliness incidents reported by ...
ttamba's user avatar
  • 141
2 votes
1 answer
119 views

Making gridded map where each grid cell shows the share of points of certain category in QGIS

So, I have a dataset of many points across Europe. For illustration purposes see this image below: Each of these points has one of four categories attached to it, so the dataset I am working with has ...
starski's user avatar
  • 161
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0 answers
70 views

Adapt this code to highlight all returned matches from search field in an OpenLayers map

I have an OpenLayers map documenting nut trees on my farm. I have a search field to search the type of trees. When a single tree is selected in the search dropdown a tree is highlighted. I would like ...
Ben's user avatar
  • 1
2 votes
1 answer
88 views

How to hide layers on the "minimap" in the print layout [duplicate]

I am new to QGIS and I am running into a small problem. How do I hide the layers (shapes) showing on the minimap in the print layout? I want them to show on the big map but not on the small one ...
Nico's user avatar
  • 23
0 votes
1 answer
110 views

Compute mean value of a band on each image in an Array

I try to compute the mean value of a band on each image of an imageCollection and store all the values in a Array to compute the RMSE with another dataset that I will also store in an Array (not sure ...
Aurélien Lengrand's user avatar
3 votes
2 answers
183 views

Snapping options in QGIS 3.28.11 Firenze

I work with 60 layers in QGIS, I have to set the snapping for each layer to vertex & segment. Is there any way to set this snapping options for all layers in one time instead of doing this for the ...
ysfgdr's user avatar
  • 31
0 votes
0 answers
40 views

Issues with QGIS map projection and symbolizing point data

First off, I am using version 3.28 QGIS-LR on a Macbook 2015. I am currently taking an introduction course to GIS. One of the assignments was learning to project maps and visualize point data using ...
empgis2023's user avatar
0 votes
0 answers
64 views

QGIS, Exporting .svg from a map, I can not produce it with as much resolution as in the main window

I am doing a PhD in wildfire modelling so that I need to deal with GIS data, mostly for visualizing purposes and data preprocessing. I am connecting to a XYZ tiles to produce a satellite map. In ...
Juan Luis Gómez González's user avatar
1 vote
0 answers
107 views

Export layers in QGIS back to OSM format

I downloaded a Delaware OSM file from the Geofabrik website. I want to simplify and reduce the size of the graph to speed up queries (eventually I'll run it on whole US). I'm only concerned about the ...
Vivek Reddy's user avatar
0 votes
1 answer
63 views

Colouring wrld_simpl countries with a variable

This seemed at first rather easy but turned out to be impossible to solve. I want to plot the wrld_simpl map but coloring the countries with a color gradient that depends on a variable. The countries ...
Agus camacho's user avatar
1 vote
2 answers
171 views

Creating map of visited airports in QGIS

I looked at the information given regarding airports and have downloaded that data into a CSV file for import. I have created a shapefile for my base map using OSM. How do I import the airport data (a ...
Jamie's user avatar
  • 13
0 votes
1 answer
125 views

Why are the coordinates at the grid not correct in QGIS print layout

UPDATE: The answer with the Decimal values for the grid, that has already helped. But It still seems to be incorrect. Y=0 Is not aligned to Greenwich. See Image 3 at the bottom of the page.... I ...
desputin's user avatar
  • 141
3 votes
1 answer
251 views

Blurry resolution when uploading DEM 5ft data onto QGIS

I am creating a map for the nature preserve I work at. I have been downloading Kentucky elevation data from THIS website. You can see that there is a really high resolution, and I am able to see the ...
Madeline Cox's user avatar
0 votes
0 answers
64 views

QGIS Least Cost Path Analysis taking forever

I have been trying to calculate the Least Cost Path (LCP) between two points on my map. These points are approximately 100km apart. I have created a slope from my DEM raster, created proper vector ...
Brittany's user avatar
0 votes
0 answers
48 views

Blank output on 3D Map view on height data with projected CRS - QGIS 3.30.3

I have some CSV height data which has been imported as Lat,Lon,Height with a CRS of EPSG 4326.I want to produce a 3D view which shows each height element as a column and ideally join the points with ...
Bob Crawley's user avatar
0 votes
0 answers
76 views

How to create multiple maps that once printed can be sticthed together in QGIS

I have a map of a parish which I can print as A1 at say 1:25000 scale. However, if I want to close in on the same area at say 1:5000 scale, then how can I then create different maps in that parish ...
Rebecca Parr's user avatar
0 votes
0 answers
577 views

Canadian Postal Code Boundaries from Google Maps

I am working with the R and Python languages. Suppose I search for the following Canadian Postal Code (M5V 3L9) on Google Maps: https://www.google.com/maps/place/Toronto,+ON+M5V+3L9/@43.642566,-79....
stats_noob's user avatar
4 votes
1 answer
235 views

How to use XYZ tiles from zoom 11 to a higher zoom

I have generated my own map tiles for zoom 11 (only). I display these tiles in QGIS via XYZ tiles (as a new connection - file:///D:/tiles/11/{x}/{y}.png). They show up fine for the zoom 11. However, I ...
Lubor's user avatar
  • 43
1 vote
0 answers
38 views

QGIS: print composer legend layer order management trouble

In the print composer I cannot change the order of items displayed in the legend: the buttons "Bring up/down items" seems not working: after doing their task for few times, suddenly instead ...
SirB1's user avatar
  • 185
0 votes
1 answer
48 views

Reclassified image not showing in Google earth engine

What I am trying to do is simply reclassify the spectral indices generated in the google earth engine based on some threshold values. The thresholds are generated in the earth engine platform only. I ...
CESCRA IARI's user avatar
1 vote
0 answers
108 views

Identify EPSG code from image

We made a project where we asked students to draw things on a map. Now I would like to import the results into QGIS, but I am unable to find it. I used a picture but cannot find the name of the ...
Ripa's user avatar
  • 21
0 votes
1 answer
57 views

How to export raster with vector in QGIS?

I have a question. I have a raster and vector. And I want to export '.jpg' file as raster with vector. Is there any way? raster is map vector is road of map
thisLecture's user avatar

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