Questions tagged [mapping]

The act or process of making a map.

Filter by
Sorted by
Tagged with
-2 votes
0 answers
24 views

Australian map grid zone 56 to lat long [duplicate]

Converting the below coordinators to degrees minutes seconds so I can plot on Google Earth. The location will be around Gympie Queensland Australia, most likely north... AMG 4612 70065 The source data ...
0 votes
0 answers
46 views

Integrate Carto datasets in OpenLayers 6 [closed]

I have an application that's using OpenLayers6. I want to add a layer from a dataset in Carto to the map. The official documentation of openlayers mentions a public account. How do we get data from ...
0 votes
0 answers
12 views

Check if a point is visible on the map's viewport [closed]

I'm trying to check whether a point is inside a rectangle area of a map. Input data: latitude and longitude(x1,y1) of the left top point of a map area latitude and longitude(x2,y2) of the right ...
2 votes
1 answer
59 views

What is this "flag" marker in bottom right corner of altas? [closed]

A relative has a "Political map of the world" on the wall in their house. It has this "Flag" symbol in the bottom right corner. There are no other symbols like it on the map. What ...
  • 128
0 votes
0 answers
12 views

Broken image while producing LULC map using Dynamic World V1 dataset

I am using the dynamic world v1 dataset for creating a LULC map for the Florida Panhandle area. Whenever I take a small time period, I get an incomplete, kind of broken image. I am trying to find the ...
0 votes
0 answers
17 views

Printing a map to 1in=40ft scale on 24in x 36in paper, but need it to fit to the entire paper

I need to print a map to 1:480 scale but have the map fill in a 24in x 36in paper. I'm trying to print a map of a parcel with a building lot and contours, however too much of the surrounding area is ...
3 votes
0 answers
39 views

Trying to make a map via Print Layout using an Atlas, but information I request from a particular column is returning values from the wrong column?

I have a legend in the map atlas where i am trying to return the Date value from the atlas feature (i.e. [% "Date" %], pretty simple) but instead of returning the value stored in the "...
  • 91
1 vote
0 answers
19 views

Using this SVG as map in OpenLayers

I have a working OpenLayers web page using standard maptiler tiles, and tons of markers as points using lonlat. Now I want to migrate from the maptiler tiles to a particular world map in SVG format (...
0 votes
2 answers
46 views

Identical print layout for multiple maps in QGIS

I am new to QGIS and can’t find the answer to my question anywhere online. Once I create a print layout which I am happy with, is there any way to use the same layout for other maps as well? I.e. use ...
  • 3
0 votes
0 answers
66 views

How can I access a Folium map from within JavaScript/Leaflet

I am working on a Folium map and am trying to inject parts of the leaflet/js solution suggested in this thread in my code. My map has already been initialized in Folium, so I don't want to initialize ...
1 vote
0 answers
26 views

Splitting polygons while keeping the same entry in attribute table

I have a map of several agricultural fields with unique data for each field. I want to run some calculations per cultivated area based on the polygon layer. Some fields have roads running through them ...
0 votes
0 answers
47 views

r-Mapview not loading background map unless I am online

Looked around but am quite lost. I am new to mapping a set of coordinates that a dataset will provide me. I am using R because it is the only approved program that I can use in my workplace. While I ...
0 votes
0 answers
67 views

Geemap does not display map in Jupyter Notebook running in Ubuntu

I am trying to display world map using the following command. m = geemap.Map() m.add_data(data, column='POP_EST', scheme='Quantiles', cmap='Blues', legend_title='Population') m in the jupyter ...
0 votes
1 answer
51 views

Subsampling a GPX file to compress it into a target file size

I have a GPX file, which I'd like to import in Google Maps. Google Maps can only import GPX files up to 5 MB. How can I subsample my GPX file to compress it into a target file size (in this case, 5MB ...
0 votes
0 answers
25 views

One large GPX covering British isles, need to figure out how to display connections between the points which is currently proving tricky

I have a large gpx, it covers most major roads and some secondary roads of the British isles, I intend to use the coordinates to display a rudimentary road map on a device with low memory, I currently ...
0 votes
0 answers
7 views

How we reflect the Z-value in Derived?

I using QGIS Desktop 3.20.0 (free download). How we show the Z-value in Derived? Please refer the screenshot.
  • 1
1 vote
1 answer
65 views

How do I merge a feature collection contaning several feature collection into one?

Here I am trying to get a merged feature collection containing the data row-wise for the 24 extracted images but instead I get a feature collection which has 24 elements as feature collection. I want ...
1 vote
0 answers
53 views

ArcMap 10.8.1 export map to PDF doesn't work properly

I have a data frame in ArcMap 10.8.1 with EPSG 25832. There are several shapefiles and one shapefile with measured data, one raster file and one annotation file. All data are included in a map layout. ...
  • 551
1 vote
0 answers
51 views

GEE Python API Map Visualization not working

I am working in Google Collaboratory and the Google Earth Engine Python API Map will not show. It was all working as of 7/6 5pm EST and then 7/7 at 10am it stopped rendering. I have attached my code ...
0 votes
0 answers
64 views

Protect my GeoJSON in Leaflet

My GeoJSON map is published by Leaflet, how can prevent download from user who want to steal it? I'd taken long time to prepare GeoJSON and I want to preserve my effort. Any suggestion? Do I need to ...
1 vote
1 answer
53 views

How do you draw a line on a tiff file? (complete beginner)

I am a complete beginner to QGIS and everything that surrounds it so bare with me. I have a tiff file (map) that I have managed to georeference. Now I want to draw a simple line (trail) on the tiff ...
1 vote
0 answers
38 views

Flux maps (?) in QGIS [closed]

How this kind of map that I think is called "Flux map" can be performed in QGIS? I'd like to implement it in a time model of wind streams.
  • 43
0 votes
0 answers
24 views

How to fix "Import ArcPy" glitch in ArcMap?

I just got this problem where my screen in ArcMap has this constant "import arcpy" phrase in the middle of it. It happened after I ran a Python script, but I deleted everything related to it ...
  • 45
1 vote
1 answer
45 views

How do I get a correct scalebar on multiple maps in a single map layout in QGIS?

I am making a map with two main maps and a single inset map for context. My scalebar appears to be showing the correct scale for the inset map, but when I add a scalebar to one of the main maps it is ...
  • 195
0 votes
0 answers
29 views

How to resolve conflicts to replace deleted elements

Initial Goal: My initial goal was to download an area from OSM using JOSM, run the JOSM validator on the area, and fix all errors and warnings that it reported. I do not intend to upload back to OSM. ...
  • 1
1 vote
0 answers
153 views

Advance a Interpolation

Hello I would like to interpolate my data with Universal Kriging (UK). As you already know, with UK a drift is assigned to the data! I would like to make the data dependent on the altitude as the ...
  • 11
1 vote
2 answers
85 views

Atlas and county level data, but creating maps zoomed out to the entire U.S map

I am using QGIS 3.16.12. I have a dataset of 150 retail companies, each selling a product over 100 counties across the country. This dataset also includes data on the number of sales per county for ...
  • 109
6 votes
2 answers
182 views

Creating graduated classes for election swing map in QGIS

I am using QGIS right now to create an election swing map. This is different from a usual election map in that it measures differences in winning margins from one election to another. For example, Joe ...
0 votes
0 answers
10 views

map icon attribute popups

I have a code that plots points on a map for an Json file. I would like to have a pop up menu with some of the other attibutes in the json file when icon is clicked. I tried several examples but can ...
0 votes
1 answer
30 views

MapInfo connect points in one layer to a single point in another layer

I have two layers in MapInfo: Layer 1: employees - hundreds of points Layer 2: place of work - one point with site location I am looking to connect (ie draw a line) for each employee to the single ...
  • 319
0 votes
2 answers
43 views

Can I change the max band value of sentinel 5P methane in GEE?

I am working on GEE using Sentinel 5P methane dataset. The min and max band value for this dataset is 1750 and 1900 ppb respectively. When I run the code using this value, I get majority areas to be ...
0 votes
1 answer
48 views

Exporting raster of a map to QGIS from GGplot in R

I used R to make density surface models of whales in GGPLOT. However, l can not work out how to get the model into a raster so i can use it in QGIS. I have been trying as below but the squares of the ...
1 vote
0 answers
45 views

Create Extent to use in mapView.goto

I would like to use the goTo() method of the mapview, and pass it an Extent that I construct in the code. I created the extent by: const extent = new Esri.Extent({ xmax: maxX, xmin: minX, ...
  • 123
4 votes
3 answers
122 views

Edit polygon - QGIS - remove a line or space in middle of merged polygon

I am editing a map using QGIS. Here my steps 1. Select multiple polygons 2. Merge them into one new polygon Question: How can I remove those line (in blue circle) and one polygon fully cover the ...
1 vote
1 answer
41 views

Scaling problem when projected map is overlaid on basemap in QGIS

The problem My georeferenced and projected Matplotlib map overlays with an offset on a basemap projected in QGIS with the same coordinate reference system. What I did: I created a map in Matplotlib ...
1 vote
1 answer
156 views

Google Maps not being quite top-down in QGIS

I am quite new to QGIS, but am using it for utility mapping at work. I have added a google maps layer to my QGIS project via http://mt0.google.com/vt/lyrs=s&hl=en&x={x}&y={y}&z={z} and ...
1 vote
1 answer
17 views

Retrieve scale-value of a specific map in specific print-layout for using this scale in model-builder

I made a model with the model-builder which create a grid with its height- and width-size dependend on the size of a certain map in a certain print-layout. It allready works fine. But that for I need ...
  • 11
3 votes
1 answer
128 views

Creating symbology based on range of values in QGIS

I would like to create a map in QGIS 3.16.13 where I am able to distinguish between forest cover increase, decrease, and stable forest. My values are between -99 and 100. How do I create a colouring ...
  • 143
3 votes
1 answer
118 views

Delete specific values for contour lines in an attribute table for deletion in line data with QGIS

Issue: I have an attribute table showing contour lines for both bathymetric and terrestrial data. As my study is entirely focused on the marine environment, I would only like my maps to show the ...
0 votes
0 answers
73 views

How to color lakes and districts in GADM maps?

This might be a trivial question for regular users but I still couldn't find a quick and easy answer. I'm trying to create a map of Uganda in R using data retrieved using the getData("GADM", ...
2 votes
2 answers
111 views

How to remove the cells are zero or null from the map

I want to remove empty cells to obtain a map map like (b) from the above map (a). Do you know a simple way to do it?
1 vote
1 answer
41 views

Take information from point along coast and make it inland

I'm trying to create a map in ArcGIS Pro using the National Coastal Erosion Risk Mapping Dataset. The dataset shows the likely amount of erosion (metres) at each point along today's UK coastline. I'm ...
3 votes
1 answer
87 views

The layer does not appear

My task was to upload a CSV file to QGIS. The CSV contains location data. When I load a layer, what happens is that a layer appears that contains the correct attribute table, but the points don't ...
1 vote
0 answers
23 views

ee.List map function, using value to filter ee.Featureset

I am converting the image into a vector, but because it might return more that 5000 features I want to union all the features that have the same elevation property. I run the following code, but the ...
  • 11
0 votes
1 answer
39 views

Mapping data >1 standard deviation from mean

I have several geoTIFF files generated by Google Earth Engine (GEE) from Landsat 8 scenes. Each file covers 100Km^2, with each pixel covering 30m^2 and containing a calculated value of Land Surface ...
0 votes
0 answers
115 views

D3.js globe view data visualization

I am using D3.js globe view as in the code penhttps://codepen.io/EleftheriaBatsou/pen/VQxdVY?editors=1000 India map that is in the globe view widget is not same as the one while verifying the globe in ...
0 votes
1 answer
31 views

How can I use "spline" or Interpolation on a UK Map? [closed]

Basically, I have a number of data across a number of UK cities (London, Aberdeen, Birmingham, etc.). I want to plot them onto a map and then use something like a "contour map" to get ...
  • 1
2 votes
1 answer
437 views

Turf.js lineIntersect() not giving intersection of lineString and feature?

I'm displaying some polygons in Leaflet, and using Turf JS to do some calculating. After drawing a line between the centroids of two neighboring polygons, I want to find the intersection of the line ...
  • 155
3 votes
1 answer
101 views

Automatically move overlapping labels from multiple layers and features

So I am currently making a overview of a water system including manholes and pipelines. However, in some situations the parts are so small that the labels are overlapping. (see picture below) I tried ...
  • 55
2 votes
1 answer
39 views

Indexing DB data using MVT Indices

I have a dataset of ~5M records that I want to be able to filter and display dynamically on a map in a web application. Based on When to use GiST and when to use SP-GiST index? I have used a few ...

1
2 3 4 5
10