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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1answer
66 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
44 views

Plotting species distribution on map in R of Europe and Africa

install.packages("rgbif") library("rgbif") Species.Name <- "The name of the species" #Search GBIF and download observations Species.key <- name_backbone(name=Species.Name)$speciesKey locations ...
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1answer
2k views

Maps with numbers and postcodes using QGIS?

I have a list of UK postcodes and a number of participants in a survey. I would like to map the first three letters of the UK postcode and I would like a shape....a circular shape for example which ...
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1answer
68 views

Vector data displaying incorrectly

I'm having an issue where the vector layer I am using is not working with with the basemaps (see figure). I know the issues is because the vector data is trying to draw a shape from the end of one ...
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28 views

How to plot postgres data on a map?

I have a table which has latitude, longitude and some sensor data (data 1, data 2,data 3) saved in postgresql 12. I am running the database on ubuntu 18 virtual machine with windows as host. I dont ...
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1answer
45 views

Google API Geocoding in MS Excel for free

Good Morning, I am seeking the solution enabling me to do any address geocoding in Excel with using Google Maps Geocode Api. Basically, the task is possible via Google Sheets, what has been ...
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1answer
21 views

Export latitude/longitude coordinates of a R map plot into an external file

I have a simple map and like to export the used coordinates of latitude/longitude into an external CSV file. Is this possible? library('maps') map(database='world',regions='germany')
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1answer
1k 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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1answer
27 views

Two R plots with different scaling

I want to plot two countries: library('maps') map(database='world',regions='germany') map(database='world',regions='burkina faso') But "burkina farso" is clipped by the x-region of "germany". How ...
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2answers
264 views

Basemaps provided by Esri

I have a general question for those who use Esri software: Is there a big difference between the basemaps available for QGIS and those provided free by Esri to its customers? I tried to use the Esri ...
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1answer
934 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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49 views

Using ArcGIS styles on QGIS 3.12

I would like to use some styles downloaded from the internet in .stylx format within QGIS. Is there an easy way to do this? This is the link to the style I would like to use to create maps: ...
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2answers
125 views

Create quantity map in QGIS

I have shapefile that has data about each country like population size, smoking rate and more. Is there any simple way to display this data as circles on top of each country? something simmilar to the ...
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27 views

Setting up MouseWheelZoom on the map in OpenLayers3

Well, I`m working on my own pet-project and using for this OL3. I need much help with creating a zoom for my map. The documentation for OL says that they do not have a built-in zoom by default, and an ...
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2answers
66k views

Clipping a raster in R

I am building a map for the northeastern U.S.A. The map background needs to be either an altitude map or a mean annual temperature map. I have two rasters from Worldclim.org which give me these ...
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1answer
43 views

Recreating maps from “The $50 American Road Trip”? [closed]

I would like to recreate for cities in my country the maps represented here, using ArcMap. On the same site I found the calculations, but I don't really know how to recreate those tables. After ...
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1answer
33 views

Plotting Bar Charts on top of Maps in R

I am trying to place bar charts on top of a map of the United States. For whatever reason, I receive this error: > mapbars(x=x1, xllc=-110, yllc=40, barwidth=.5, maxheight=5) Error in mapbars(x = ...
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1answer
21k views

Highlighting area in Google Maps on mouse hover

I want to implement a feature in my app (gmap powered) to highlight the area on mouse over. Much like the functionality in wikimapia. Check out the pic or url But i could't find any info on how to ...
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1answer
246 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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2answers
123 views

Crediting QGIS and source of map data in print

I am new to QGIS (3.4.12-Madeira installed) and have made myself a bit familiar with it the last few days. When creating maps for a printed hiking-guide, I would like to credit QGIS as well as the ...
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3answers
13k views

Using OpenLayers maps with SSL

I am using OpenLayers map by using the hosted JavaScript: <script src="http://openlayers.org/api/2.13.1/OpenLayers.js"></script> But my client has SSL installed and when I try to run ...
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2answers
37k views

Offline Maps API for C# Desktop Application?

I have a C# WPF application which has browser control to display a Google Map. Google Maps API v3 is being used in the application. I use data received from a service to plot users current location ...
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1answer
262 views

Google Earth Engine API map deploy to a website

Can we convert Google Earth Engine code (i.e., which is written in GEE console) to JavaScript so that it can be viewed on a website/app? I have gone through the GEE API documentation (https://...
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1answer
6k views

How I do rotate a map using Leaflet?

How rotate map using the leaflet? I was trying here, but nothing worked. I followed this tutorial, even though it was from the mapbox, I assumed it was useful: https://www.mapbox.com/mapbox-gl-js/...
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17 views

Creating a map server like mapnik [duplicate]

I'm totally new to GIS and the Map engine project is been given to me. Since I'm new, I'm lacking the concepts and the way to go. Let me explain, what I need to do. My company wants to replace the ...
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0answers
36 views

Cannot download data from ArcGIS Online

I am new to ArcGIS Community, and I am currently following a MOOC to learn about ArcGIS. When I try to add Data from ArcGIS Online on the ArcMap Desktop panel, some of this data simply never show up. ...
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3answers
425 views

What USGS maps exist in the 7.5' × 15' metric 1:25,000 series?

While browsing through the library, I discovered that USGS has, in fact, produced some metric maps at 1:25,000. One example is Thendara (NY), 43075-F1-TM-025. As far as I can tell, those maps are ...
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0answers
39 views

How to find the coordinates (longitude, latitude) of a point in an aerial image? [closed]

I will be receiving drone images from an associate. It'll have longitudes/latitudes values from the corners of the image. I don't have access to his image processing S/W. It'll be in a relatively ...
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1answer
4k views

how to customise toolbar in Leaflet.Draw plugin?

I downloaded the Draw.js and one ccs file to use the Leaflet.Draw plugin, but now I need to customise the toolbar (i.e want only polygon and marker).
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0answers
85 views

What is this line in the middle of nowhere?

Coordinates:https://www.google.com/maps/place/Ramsey+Island/@73.3566979,177.7371323,1017153m/data=!3m1!1e3!4m5!3m4!1s0x30fa7771d2910233:0xbf0ed91f32e1737c!8m2!3d12.4930556!4d97.8388889 What is this, ...
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0answers
20 views

Where would I be able to obtain or purchase GeoJSON data for Manhattan submarkets?

GeoJSON data contains arrays of coordinates that create polylines. You can find geoJSON data for the 50 U.S. 50 state borders, for example. I would like proper geoJSON data for this: https://www....
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1answer
126 views

From QGIS to Google Maps coordinates

I try to convert QGIS coordinates to Google Maps coordinates. I use this form: geom_to_wkt( transform( $geometry, 'EPSG:25832', 'EPSG:4326' ) ) I getting the coordinate like this: Point (12....
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0answers
43 views

How can I map 3000 geotagged photos? [closed]

What could be the best solution for this? I'm looking for the simplest way to create an online map with 3000 photos in it. I'm looking for batch upload (say, upload all the photos in a folder). ...
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0answers
57 views

How to download all Points of Interest within a boundary from Google Maps

Is there any legal way to download google maps POI information such as number of POIs within a district boundary, using area shapefiles? How about length of roads within an area boundary? Output ...
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2answers
73 views

Running ArcGIS webmap on Android Phone? [closed]

I have a ArcGIS webmap ( http://lvrs.maps.arcgis.com/apps/Viewer/index.html?appid=a2756011923849659bc76ecd5ef7201c) and I am wondering how would I export this and actually be able to run this on ...
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0answers
99 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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4answers
13k views

How to know if a point is inside a rectangle on the map?

I have four points that represent a rectangle (a,b,c,d). I got these points from mobile GPS. In my database I have this table of business locations: bussId | longitude | latitude --------------------...
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0answers
74 views

How to use SVG file as the source for a layer in OpenLayers

I found this solution online but this is defining your own projection. I do not want to use the projection below, I want to use 'EPSG:2326' and put the svg file over the map such that it overlays on ...
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0answers
45 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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0answers
47 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 ...
3
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1answer
214 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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0answers
110 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, ...
2
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3answers
10k 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
452 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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3answers
416 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
62 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
45 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.
1
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1answer
44 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
645 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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1answer
316 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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