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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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45 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 ...
1
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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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0answers
52 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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0answers
19 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
27 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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0answers
22 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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0answers
10 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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0answers
25 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
87 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
40 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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0answers
33 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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0answers
51 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
73 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 ...
2
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2answers
187 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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0answers
69 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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0answers
158 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
67 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
72 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?
2
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1answer
58 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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0answers
239 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
40 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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0answers
26 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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0answers
38 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
537 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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0answers
112 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
264 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
75 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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0answers
43 views

Adjusting Font Size and Page Layout for Map Export

I have been trying to publish maps with legend, scale bar and arrow. But after editing, when I add a legend, a scale bar or an arrow it is too big and I don't know how to bring it to an acceptable ...
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0answers
198 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 ...
2
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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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0answers
160 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
163 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
62 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
3
votes
2answers
309 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
752 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+...
2
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2answers
60 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
44 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 ...
1
vote
1answer
49 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 ...
3
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1answer
65 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 ...
0
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1answer
165 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") ...
2
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0answers
218 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 ...
1
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1answer
245 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 .
1
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1answer
369 views

Problem deleting elements in map composer

I would like to make a query about the use of the map composer. Sometimes, when I add elements to the map, for example the scale bar, I have realized that I can delete it by pressing only the Delete ...
0
votes
1answer
84 views

Making a map with 8 different rasters of the same place but with only one legend in QGIS [closed]

I have 8 raster images of a farm that are changing with respect to time. I want to create one map as shown in the attached image which will show the 8 raster images with only one legend to represent ...
2
votes
0answers
384 views

Clustering of polygons on map using Leaflet? [closed]

There is a plugin for Leaflet to cluster the markers.The result looks like so. Result: If I like something to do to show clusters of circles and polygons? For example, when you hover over a cluster ...
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1answer
90 views

QGIS printing acting REALLY strange

I'm printing a 11 x 17 map but the QGIS print properties are acting weird. For instance , i set my composition presets to ANSI B (11x 17 in.) and the page setup to 11 x 17 but it prints off a 11 x 17 ...
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1answer
195 views

Difficulty drawing map lines across the international date line; Connection Map Visualization in R

I'm creating a visualization from country centroids to a few thousand coordinate pairs, and I'd like them to all be displayed unbroken and smooth on the same map, but I get these horizontal lines when ...
2
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0answers
120 views

Serving map files with Nginx

Currently i am serving map tiles with gunicorn and tilestache with nginx reverse proxying gunicorn. This works, although for some reason i am unable to do anything with the appearance of the map as it ...