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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23 views

To check if the area within circle radius has any feature of layers from GeoServer

I have used google map to show the WMS layers from the GeoServer. Now what I am trying to do is, I have drawn a circle on a Google map. Whenever I change the radius of the circle I want to check if ...
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1answer
29 views

How to calculate pixel size on image of map?

I have to save to .png file with part of map from app. I've got information about PPI, easting/northing, print resolution, map scale and map coordinate system and using this information I have to ...
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1answer
72 views

What are “degrees” in SRID 4326 and why can't they use meters? [closed]

I want to return all the houses for sale within 500 meters from my own house. I have this query: SELECT * FROM houses_for_sale WHERE postgis.ST_DWithin(coordinates, $1, 500); It returns houses ...
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36 views

Anyone know the location of these Geo Vector Tiles from an iOS 13 image?

Last year I convert these files, but I cannot remember and I cannot seem to find any current information on them. You can find more here: https://cyberfenixtech.blogspot.com/2019/10/examining-maptiles-...
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15 views

spplot of a vector of values

I merged the shape file of the Los Angeles county ("LA_shp") with a cross-section cvs containing a certain number of variables and their respective values for the different areas of the ...
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18 views

Using R to plot maps using different projections

I currently plot global maps in R using the standard projection in maps (). As far as I understand this is the mercator projection. Now I want to use a projection that better represents the areas of ...
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1answer
38 views

Altas with different numbers of page and maps for every feature

I want to create an atlas and the features to show are OUTSIDE the feature of the layer coverage. The atlas feature 1 is Switzerland, but I want to show all embassy that are geographically OUTSIDE ...
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10 views

In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class?

In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class? For example 2,1-4,0 degrees Celsius "deep blue". Class 4,1-6,0 "...
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1answer
23 views

Is there a standard vernacular for levels of political boundaries (specifically city, county, state, nation)

While building a geotemporal web app, I found that virtually all countries followed this simple four-level structure, akin to what we in the US of A call: city, county, state, nation. However, most ...
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2answers
50 views

Concept behind longitudes

Why longitudes are not parallel and why do they meet at the poles? What problem would have happened if like latitudes they were parallel circles running from west to east? I would request the ...
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16 views

Showing size of pie chart in legend of ArcMap 10.7.1

I'm using a pie chart map in which the size of the pie chart convey an attribute value (scaled size). Is it possible to show this classification in the legend of ArcMap 10.7.1 ? There is a similar ...
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69 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
137 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
23 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
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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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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2answers
333 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
107 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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62 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
160 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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0answers
30 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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1answer
40 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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2answers
190 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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1answer
330 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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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
44 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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48 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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0answers
86 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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1answer
181 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
45 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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48 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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0answers
140 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
257 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
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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0answers
125 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
583 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
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
45 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
801 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
69 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
200 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
276 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
292 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
42 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
237 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
1k 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
215 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
701 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
399 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
114 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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