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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16 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
7k views

Creating draggable circle in Leaflet? [closed]

Can you tell me how to create a circle in leaflet which can be dragged across the map? I do not want to use Circlemarkers as i want to specify radius in meters and also the size of circle should ...
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3answers
69 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
50 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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3answers
341 views

Authagraph world map with deformed south pole instead

Read this first: The north pole is deformed on AuthaGraph world map I am interested in an authagraph map, where the tip of the tetrahedron is orientated to the south pole instead, so the deformation ...
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1answer
28 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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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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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
78 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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21 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
253 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 .
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23 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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1answer
45 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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1answer
635 views

Map all time steps of a NetCDF file in R using a loop

I have a NetCDF containing temperature values over a certain region for 2011, with 1-hour intervals, so that means that I have 8760 maps. What I want to do, is plot all 8760 maps using one color ...
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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
26 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
105 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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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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1answer
3k views

Using one map, multiple layouts, each with different layers in ArcGIS Pro?

I was wondering whether it's possible in ArcGIS Pro to create multiple layouts for one map, which contains different layers (e.g. aerial photo, buildings and soiltype). After prepping the map in 'map ...
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5answers
8k views

Google maps, download entire province/region from google maps

Is there a way to download a region from Google maps to a PDF or JPEG file? I would like to download as many zoom levels as possible so I can zoom in and out without being online. I need this for ...
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71 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
77 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
268 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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74 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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1answer
1k views

Interactive maps for a survey - Are there any tools yet?

i am working on a draft for an online-based survey. I would like to enable the participants of the survey to draw polygons, lines and points (several) on a basemap (e.g. google maps) and (extra ...
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123 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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195 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
73 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
76 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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0answers
265 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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0answers
30 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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40 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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3answers
5k views

Organizing GIS projects? [closed]

I have been struggling for quite a long time now with keeping my project files organized. What are your tips for keeping your datasets, images, shapefiles, etc.. organized?
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1answer
1k views

How to decide geohash length based on zoom level?

I want to decide geohash length based on zoom level, how can I do that because so far I am unable to find any standard way to do so? For example, current zoom level is 10 and geohash is "...
8
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4answers
5k views

Create an inset map in R

I need to create a map of my sampling site, and the journal requested to make an inset map showing where in the world this map is, this is my map code. library(maps) library(GISTools) map('state', ...
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1answer
664 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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1answer
64k views

Truck Routing in Google Maps?

I know that Google Maps does not have a truck routing feature , ie, changing the route if a low bridge is detected. Is there a way I can implement this in Google Maps using a 3rd party API? If yes,...
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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
841 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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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 ...
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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1answer
299 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
91 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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46 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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2answers
887 views

ArcMap label font size vs callout font size

Within ArcMap 10.1: When converting labels to annotations I have specified a font size of 14. I have also created a number of callout text annotations within the map and specified exactly the same ...
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0answers
222 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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0answers
172 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
183 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 ...
3
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2answers
323 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 ...