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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Using Folium.DivIcon to plot multiple LineStrings Length on 1 map

I have the following GeoDataFrame "melissa_segs" which is a result of an exploded Polygon and CRS is 'ESRI:102009' poly_id vertex_id seg_length geometry 0 1 103.0 LINESTRING (-1224668.715 ...
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6 votes
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Saving a map from a new print layout pane in QGIS

I have created a map with different layers, labels, scale bars, a north arrow, a legend, an overview pane, and other modifications. It took a long time to produce this map within the 'New Print Layout'...
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can lat long of a place could have different precision from google maps [duplicate]

When I select for lat long in google maps I could see the precision after decimal places are same for both, for an instance a place could have [12.941963598406998 {15} , 77.60827701942743 {15 ]( both ...
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polygon segments length as labels on folium maps

I have done this on QGIS, as shown in the screenshot, but I need the same on folium python, I have used this answer getting length of segments of polygon to generate the same but missing the part of ...
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Color osmnx map by place (using graph_from_place() method)

Let's say we want to graph the two below villages, which are in the UK. We also want to colour the streets by length. We can do: # Get data import osmnx as ox place = ["Broughton Hackett", &...
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Improving resolution of map using QGIS

I am using QGIS. I have a shapefile of Africa. In that shapefile I divide Africa in cells. After, I graduate all the cells according to one variable (see first picture). I would like to see the entire ...
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Calculate growing degree days using NetCDF file in R [closed]

I have a NetCDF file containing temperature values over a certain region from 1984 - 1985, with 1-hour intervals, so that means that I have 17544 maps. I need to do two things and I got a bit stuck ...
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Setting Dark Mode for WMS in QGIS

I want to implement a OSM into QGIS via an WMS service. We see that this is easy, right? I thought so too. In my case I want to implement a night mode map, like you would find in Google Maps when you ...
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194 views

Setting map view with 50 miles of radius of marker with mapbox

I have a mapbox map with a marker and I want to add a radius around it, say 10 miles. Now I can add a circle to the map, even though I do not want to, but I cannot get it to fit the screen. I have ...
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OS Maps API – WMTS map (EPSG:27700), Point and Route layers fail to draw

Can anyone help a Nube? I'm learning OpenLayers using OS Maps. I am using WMTS(EPSG:27700) projection. The OS map displays, however, point and route layers do not, although I have successfully got ...
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Choosing map projection type for flight plan [closed]

There are two projection of maps that I saw online. UK CAA is a transverse projection map, while ICAO maps are conical. It seems that transverse map is easier for flight planing as straight lines are ...
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Extract shapefile from scanned PDF map using Open Street Map?

I am new to QGIS. I have a scanned PDF document containing maps of the Italian highway network development year by year from the 1920s to the 1990s (i.e. showing the pre-existent network in a given ...
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ArcGIS Pro: where does arcpy reference map order?

Problem: In an ArcGIS Pro 2.8 Notebook, how is python reading the map order? I have to know this because when I use a list the items in that list are based off the order of the maps. When that order ...
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Matching polygons with many points using QGIS

I'm building distribution maps for several species in QGIS but I've been struggling to match the country borders with the lines of the distribution maps. As you can see in the next picture, both ...
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How in QGIS to place the signature of the latitude and longitude of the map corner in the layout?

It must be done as in the example.
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131 views

Standard deviation map shows pixels as null in GEE

I need some help in understanding image reducing with kernels. I have a code that generates a band of NDVI stdDev 3X3 kernel. When I map the layer the outcome is an image with empty pixels with a ...
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1 vote
2 answers
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Digitizing photographs of a map

Is it possible to digitize the photographs of very old maps, having no co-ordinates. The photographs are exactly like this. If possible, could somebody tell me how to proceed? I have access to ArcGIS ...
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What's the difference between LayerTiles, Overlay Maps, Maps, etc

I am currently learning leaflet and I see a lot of posts mentioning "Layer Tiles", "Overlay Maps", "Layers", "Maps", so I wonder, what the difference of these ...
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Customizing Layer Display in Map based on Nested Criteria selection with dropdown field outside the Map

I have about 5 different polygon map layers on a map. Each map layer data is stored as separate JSON file (Eg: continent1.json, continent2.json, ...... continent5.json). Every layer have its own ...
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How to make a layer using mean squared error(MSE) from temperature prediction?

I made a temperature prediction for the next 4 hours using a dataset for 1 year with 10 minutes interval time. I have a file with the coordinates from 20 weather stations (longitude, latitude and ...
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2 votes
1 answer
66 views

How do I find the geographic mean of a multipoint feature in QGIS?

I'm trying to find the geographic mean of the multipoint feature in the above image. It seems like a really simple command, but I cannot find any way to do it.
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Adding StreetView add into Google MyMaps

A customer uses Google MyMaps to track relevant location data. They want to be able to use the StreetView addin in their map but I can't seem to find a way to implement it.
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2 votes
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48 views

Can I add 3d models on maps in QGIS?

I need to overlay 3D models of buildings I have designed in a separate CAD software. I want to add .stl or .obj files with proper scaling on the 2D map on qgis so that I can make a 3D map with 2D base ...
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1 vote
1 answer
184 views

What is the way to calculate center possitions from WKT format POLYGON?

I have a polygon, for exapmle `POLYGON(( 4977994.67879995 5126870.48124117, 4977998.08163505 5126894.51511692, 4978000.17683601 5126902.67634682, 4978001.98260158 5126910.54986973, ...
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5 votes
0 answers
103 views

Earth Engine coordinates in a map

I am beginner and I'm having troubles to do what I want in Earth Engine. I want to put the coordinates under the map, like this: I already made the layer, but I don't know how to put the coordinates ...
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3 votes
2 answers
264 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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1 vote
0 answers
79 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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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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2 votes
1 answer
88 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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5 votes
2 answers
2k 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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1 vote
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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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1 vote
2 answers
557 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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-5 votes
1 answer
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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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1 vote
1 answer
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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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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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-3 votes
2 answers
219 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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1 vote
0 answers
103 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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654 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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1 vote
2 answers
4k 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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1 vote
1 answer
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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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1 answer
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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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  • 125
2 votes
1 answer
109 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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4 votes
2 answers
923 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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1 vote
1 answer
953 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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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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3 votes
2 answers
448 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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0 answers
49 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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2 votes
3 answers
806 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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-2 votes
1 answer
887 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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1 vote
0 answers
58 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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