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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9 views

Buffering a point/line/polygon by a mile in React, using Mapbox to display the result

Firstly, I'm using React and Mapbox to produce a view of a map and to store and buffer points, lines, and polygons. I was wondering what way could I buffer said shapes by a mile or another metric unit,...
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20 views

Use existing ArcGIS Online map in QGIS

At my job I use these websites often to check data on oil wells in Texas and New Mexico. https://nm-emnrd.maps.arcgis.com/apps/webappviewer/index.html?id=4d017f2306164de29fd2fb9f8f35ca75 https://gis....
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23 views

Slope calculated with QGIS vs slope in GoogleMaps

I want to calculate the average slope in percent of a vector line in QGIS. I have a DEM layer, converted it to a slope layer and then I use the plugin Profile Tool to calculate the slope of the line. ...
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51 views

Earth Engine coordinates in a map

I am beginner and I'm having troubles to do what I want in Earth Engine. What I want: put the coordinates under the map (under the layer). Like this: I already made the layer, but I don't know how to ...
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2answers
42 views

How to know if a point is on linestring or near one (<0.01units) using GeoPandas

I want to know if a point intersects/touches/on the line/linestring or if the point is less than 0.01 mts (units) from linestring. import geopandas as gpd import matplotlib.pyplot as plt lines_gdf = ...
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51 views

Select area in Maps and get List of all Addresses

I am looking for a way to select a residential subdivision online maps and get a list of all addresses in that selection. What do you think? I think this thread might lead in the direction of what I ...
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11 views

Place marker on map - GeoTools 25-SNAPSHOT - Java 11 [duplicate]

I am using GeoTools 25-SNAPSHOT in my application. I have displayed a map in my application (raster). Now I want to place a marker (image or simple colored dot) on a map at a specific latitude, ...
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1answer
44 views

Unable to find print composer on QGIS

Anyone have information about where Print Composer is hiding. I have followed the instructions on the QGIS website which says it is under Projects or the button in the control panel. Neither option is ...
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65 views

Adding different types of marker on the map with using Leaflet.draw

I am using Leafletjs with Leaflet.draw to create an interactive map on my web. But I need to enable different types of "marker". And then when creating them I need to identify them. I tried ...
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17 views

How to Change and Display Marker Color and Marker Icon in GeoJSON Leaflet? [duplicate]

I have two files, .geojson and .html format, I want to use and display marker-color and marker-symbol (marker icon) in .geojson file. How to? I've displayed the basic blue popup and marker with the ...
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32 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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2answers
88 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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389 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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38 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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40 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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25 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
52 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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11 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
118 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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47 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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279 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
2k views

Google API Geocoding in MS Excel for free

I am seeking a solution enabling me to do address geocoding in Excel using the Google Maps Geocode API. Basically, the task is possible via Google Sheets, like has been discussed at How to Geocode a ...
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1answer
46 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
30 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
81 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
529 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
540 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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77 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
256 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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32 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
93 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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3answers
397 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
549 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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0answers
50 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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100 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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89 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
271 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
52 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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53 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
200 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
416 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
2k 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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148 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
1k 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
97 views

Producing density map in 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
47 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
1k 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
79 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
268 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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