Questions tagged [maps]

A visual representation of an area-a symbolic depiction highlighting relationships between elements of that space such as objects, regions, and themes

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12 views

Loading a georeferenced GIF with an OziExplorer Map Data File into a Garmin GNSS receiver?

I have a map as a Graphics Interchange Format (GIF) file and an associated American Standard Code for Information Interchange (ASCII) file which has a .map extension. The content of the ASCII file ...
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25 views

Centerline Addressing

I work for a local government and am in the process of cleaning up / updating addressing data. I have a MXD for the purpose of 'point addressing' and 'centerline addressing'. It is the centerline ...
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27 views

Union anti-meridian “multipolygons” after re-centering world map

My goal is to create a world map (using ggplot2) with a Pacific perspective. I have managed to re-center the map, by following this solution. Code below: # world country layer sppolys <-...
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1answer
69 views

Display two different maps with different layers in one layout in PyQGIS? Problem with .pdf export

I would like to export a .pdf with 2 maps (with different layers). However, some layers do not appear in the map items! I'd like: In the first map: the shapefile over the raster 1, and these two ...
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1answer
35 views

Leaflet marker popup link from outside of map dynamically

I am using Leaflet JavaScript library to show some earthquake informations. You can able to see few red circles on map. When you click that red circle it will display few details in popup. I want to ...
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20 views

Conversion from DXF to SVG

I want to convert a file from DXF to SVG and for that I am writing a python script. However, While converting from DXF to SVG there are certain features that are different such as xOffset, yOffset, ...
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3answers
77 views

Finding the right CRS for Google Map coordinates

I'm trying to find the right CRS for a spreadsheet dataset I'm trying to add to my QGIS project. I collected coordinates for wildfire fuels reduction projects using Google Maps, and am hoping to add ...
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1answer
51 views

Producing density map using QGIS?

I have placed a grid onto an open source Ordnance Survey map that corresponds to Ordnance Survey eastings and northings. I have a value for each grid square between zero and 30. How do I use these ...
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1answer
42 views

Splitting an administrative region into given number of parts

I have the following plot. I want to divide the administrative region into given number (say 20) equal parts. library(maps) data(world.cities) Pakistan <- data.frame(map("world", "Pakistan", ...
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130 views

Setting bounds for image overlay in Leaflet

I'm using LeafletJS map. I need to use an image overlay. I have done it like so: onMapReady(event: any) { this.layers.push(imageOverlay(this.imgSrc + "map.png", [[35.334847, 25.328072], [35.337847,...
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22 views

Making polygons from coordinates

I am working on a project regarding the mapping of solar parks in the rural areas of my country, unfortunately, the data that I have, are in paper and printed topographic maps. So I need to make ...
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1answer
32 views

Labeling Ortolines with GeoTools

I want to add labels with geocoordinates on the grid of the map. I have previously asked you this question and you have shared some code with me (How can I label the coordinate position of the grid ...
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24 views

Creating a pseudo-heatmap based on time spent in an AOI

I wanted to see if there was a way to create a heatmap based on time spent in a certain AOI. What I mean by this is a layer you can toggle on/off that would go from clear to red as you spend more ...
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14 views

Displaying Google Maps by Longitude Latitude Box

I want to display a certain area in google maps bounded by certain longitude/latitude. Meaning that I have 2 points (e.g. bottom left, top right) and this defines the area of the map. I found parts ...
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35 views

Creating map projection for net of geodesic dome?

I am working on a project that involves mapping the night sky's northern hemisphere onto the exterior surface of a small (16 cm radius) geodesic dome. The problem is, I don't know what map projection ...
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1answer
122 views

Animation map in R error in Loading shapefile in R

I want to make an animation map in R. I have tried several command lines but I get some errors, as follows: > library(raster) > s <- shapefile("//Users//Merry//Desktop//ro_judete_poligon//...
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1answer
57 views

How can I calculate the direction of a Google Maps polygon?

To create a hole in a polygon, you need to know if the inner polygon is in the opposite direction as the outer polygon (See here). How can I calculate this? Here are some examples: var ...
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34 views

Bing Maps and OpenStreetMap

I'm researching the contribution of Bing Maps' aerial imagery for contribution to OpenStreetMap for tracing imagery. I understand that Bing allowed OpenStreetMap only the right to trace the imagery. ...
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96 views

OSMDroid using OpenMapTiles tile server

I have my own tile server of openmaptiles.com. I am using XYTileSource to use the map map = findViewById(R.id.map); ITileSource t = new XYTileSource("test", 10 , 18, 256, "", new String[]{"...
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1answer
87 views

Retaining symbology used in QGIS when building map in QGIS2web plugin?

I am a GIS tech for a telco company, I build a lot of maps in QGIS and am always trying to find ways to share the map and its data with my workers. When i build my map in QGIS and try to open ...
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2answers
344 views

GeoJSON put in the OpenLayers maps

I am a beginner in OpenLayers. I would like a GeoJSON to be displayed on the map. Can you provide me with some example code to allow me to build this small project? The GeoJSON code is: {"type":"...
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80 views

Generating a Map (like Google Maps) using HGT files

I'm doing a programming project. It consists of generating a Map (like Google Maps) from height files .HGT Currently, I can read each file .hgt (each .hgt file have 1201 * 1201 elevation data). For ...
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226 views

Bing Map not rendering in New Print Layout QGIS 3.0

I am trying to sort out a map with a Bing aerial map plugin, yet when I select New Print Layout, the aerial image will not load/render, yet all other layers do. Can anyone point me in the right ...
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1answer
80 views

Transferring data from layer to layer in Leaflet [closed]

I use Leflet maps and I want to import data from layer to layer If the first layer is points and the other polygons I want to get the data from the polygon layer to the points if the layer of dots is ...
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2answers
79 views

What is an “infiltration map”?

I came by an "infiltration map" today. But I cannot find any definition of this on Wikipedia or the web. What is it?
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1answer
60 views

Is it poor form to rotate Albers US state projections if you're only viewing a single state?

We are using the Albers US map in a project with Alaska and Hawaii shown as well. The project allows users to zoom into a state and only see that state for more detail related to the data we have. ...
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282 views

How to change the layer selection view from Radio button to Image in Leaflet

I have implemented the below example to show the multiple base layers of map in my application using LeafletJs. Leaflet JS LayerGroup example I'm able to successfully implement the same but I'm ...
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2answers
42 views

Name multiple authors on a map [closed]

Is it: Authors: John Doe, Jane Doe or Author: John Doe, Jane Doe. It is a small difference, but I wondered how to do it correctly.
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37 views

Disperse markers - trouble with input file?

I had an excel sheet listing addresses that I imported into ArcGIS and geocoded which created a File Geodatabase Feature Class of all the points. I am trying to display the map where it disperses ...
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43 views

Composer map needs to reset extents each time

I have several maps that are regularly updated and am now having a problem that has only recently begun - each time I reopen a composer to re-PDF my maps, I have to reset the map extents. All of my ...
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1answer
797 views

Mercator map coordinates transformation formula

I have a third-party application with a city map of size 131072x131072. There are data on this map which contains x and y coordinates. I want to transform these coordinates to latitude and ...
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129 views

could not find function “merge_eurostat_geodata”

Just a couple of codes with the same error at the time of merge data: FIRST CODE: library(eurostat) library(dplyr) library(ggplot2) library(stringr) fer <- search_eurostat("fertility") ...
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1answer
328 views

Mapping data: error in classIntervals: var is not numeric

When executing the 'classIntervals' command I got the error while mapping data from Eurostat. library(rgdal) library(RColorBrewer) library(sp) library(GISTools) library(classInt) library(maptools) ...
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1answer
2k views

Aviation Overlay google maps

I would like to be able to display aeronautical charts high/low similar to flight radar 24 (Will attach picture). Is this possible please? Not sure where I can get them from.
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1answer
118 views

How to prevent Google My Maps from truncating lat long values

My Lat and Long coordinates get truncated from 37.747574 and -25.675669 to 37.74757, -25.67566 when I import them into Google My Maps. Is there a way to prevent this from happening?
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243 views

Add gridlines to projected map in R

I am producing some maps to include in a publication. However, I am not able to include a graticule on my plot such that it resembles that in the image shown below. The image is projected but still ...
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3answers
2k views

React Native - react-native-mapbox-gl vs react-native-maps

I have to develop apps with React Native for mobile that concern with mapping and found out there are two libraries for Native on this - react-native-mapbox-gl and react-native-maps. From github pages ...
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189 views

Getting Bike Lanes using Overpass Turbo

I am trying to write a query to get all bike lanes to display on a map for my project. I want to display all types of bike lanes(shared ,dedicated,tracks etc) [out:json][timeout:25]; // gather ...
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2answers
201 views

Geospatial export to PDF

I was wondering if someone can help me in the right direction to making a geospatial report. I used a drone to take aerial photos and used MME to stitch the photos together. I then uploaded the ...
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0answers
73 views

Combine two raster maps with transparency

I have two maps in geotiff format for exactly the same area with exactly the same geoinformation. The first one is a real land map, the second one is a satellite picture with clouds (rgba where alpha ...
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0answers
17 views

How to get my store locations which are withing 30 min drive distance using google map

I have the list of stores in my database. I want to show only those stores to a customer who can reach that store within 30 minutes (configurable) of drive. using google api
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2answers
340 views

Automating creation of multiple maps with different layers on same location in QGIS?

I was wondering if it is possible in QGIS 3.2 to cycle through different layers. For example, I have a workspace open with 3 raster layers (A, B and C). I would like to create 3 maps: Map A with ...
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1answer
925 views

Get Polygon boundaries of all cities or municipalities from whole country in GeoJSON

Is there a way to get geojson boudaries of all cities in a country ? The only thing I found is to find the geojson of only one city using this: https://nominatim.openstreetmap.org/search.php?q=Czech+...
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2answers
63 views

Cataloging small hardcopy map collections

We have a small collection of hardcopy maps, in the low hundreds, to catalogue and file into long term storage and are looking for lightweight guidelines and tools to do this in a way that will ...
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1answer
45 views

Possible/Feasible to download parcel map and add up to 20 layers

Novice who just downloaded and installed QGIS a few minutes ago. Currently reading about the functionality of QGIS but thought that I may be able to obtain immediate insight in reference to my ...
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1answer
54 views

Shapefile licence agreement when publishing map made with R's maps package

I am submitting an article that has a map I made using R's data from R's maps package. I know that most shapefiles come with a license user-agreement or copyright information that accompanies the map ...
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1answer
66 views

Offsetting Atlas Generated Maps

My aim is to generate maps of polling stations to helps electors find their local polling stations for elections in 2019 and onwards. I've plotted and labelled 80 polling stations on a 'Polling ...
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1answer
181 views

change ggmap to sp.: Create circle where radius represents distance (km)

I am trying to made multiple concentric circles of multiple radii in kms scaled to a map, similar this post was using the post here (ggmap: create circles). map.sp<-readShapeSpatial("C:file.shp") ...
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0answers
240 views

Weird lines on google maps [closed]

While I was travelling with my GPS "ON" and tracking my route I found this strange lines in pink and green dotted lines when I zoomed out the map I found that the lines where coinciding with the ...
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1answer
259 views

Printing multiple maps in the same pdf

Im using leaflet, Is there a plugin that allows it to print more than one map in the same pdf like this example .