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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2
votes
0answers
433 views

Clustering of polygons on map using Leaflet? [closed]

There is a plugin for Leaflet to cluster the markers.The result looks like so. Result: If I like something to do to show clusters of circles and polygons? For example, when you hover over a cluster ...
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1answer
93 views

QGIS printing acting REALLY strange

I'm printing a 11 x 17 map but the QGIS print properties are acting weird. For instance , i set my composition presets to ANSI B (11x 17 in.) and the page setup to 11 x 17 but it prints off a 11 x 17 ...
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1answer
228 views

Difficulty drawing map lines across the international date line; Connection Map Visualization in R

I'm creating a visualization from country centroids to a few thousand coordinate pairs, and I'd like them to all be displayed unbroken and smooth on the same map, but I get these horizontal lines when ...
2
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0answers
129 views

Serving map files with Nginx

Currently i am serving map tiles with gunicorn and tilestache with nginx reverse proxying gunicorn. This works, although for some reason i am unable to do anything with the appearance of the map as it ...
2
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1answer
150 views

QGIS - How do you keep a map fixed to a template?

I am creating templates within print composer for people within my company to use. I would like them to include a map of the county in the top left corner that can then be used as an overview for ...
0
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1answer
96 views

No maps visible when downloading something with CartoPackageManager

I am facing such problem: while some package is downloading with Carto PackageManager, I can’t see neither other downloaded offline maps nor online maps of any other place. In other words, if there ...
2
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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 "...
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0answers
68 views

My address is not shown in the maps how to update the maps with my new address [closed]

I have moved to my new house and not able to find it on Google maps, how to add my address to the maps.
1
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0answers
4k 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/...
1
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1answer
1k views

Multiple markers with specific infowindow content

When I'm looping through a list of addresses, I'm able to plot the markers for all the addresses fine. But when I click on any marker, the infowindow content shows data of only the last marker. How do ...
5
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1answer
2k views

Displaying polygons with colour gradients that changes at value 0 using QGIS?

I am plotting some model outputs in QGIS and let's say I have got a given number of polygons and for each one a value which can be negative OR positive. I need to assign to each polygon's value a ...
2
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1answer
2k views

How accurate is Google Maps when entering lat and long from a survey drawing

How accurate is inputting the latitude and longitude from a survey pin into google maps to look at the site location? The problem I am trying to understand is I am about to purchase a property in ...
2
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2answers
423 views

Finding Statistical Area (SA) in which address (Lat\Long) lies via R Point in Polygon?

Australian Bureau of Statistics (ABS) provide census information for all Australia. However, ABS has its own division of a state/suburb/town called Statistical Areas Level 1-4 (SA), which is different ...
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0answers
98 views

How to calculate if a turn is required from a set of coordinates?

I have some polyline data that represents a navigation route generated using Dijkstra's algorithm. Along this route I would like to calculate anytime a turn is required. Ideally, this would be some ...
1
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3answers
2k views

Approximate distance between two points (longitude / latitude) without Haversine

How can I judge from the long/lat coordinates of a point A alone whether it is possibly/certainly not within a short distance of x meters from another coordinate B, using R (without applying geosphere:...
0
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1answer
57 views

Visualizing lat/lon pairs on a map, locally

I have a sensitive list of coordinates that I've already managed to geocode locally and now need to visualize on an interactive map. They're all contained within a particular neighborhood of the same ...
2
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0answers
224 views

Shapes don't match google maps QGIS 2.18.7

I have some shapes (in EPSG:4326 wgs 84) that match with Openlayers ->google street maps only when I do enough zoom-in. But When I zoom-out seems that my shapes move to the east. What could be ...
1
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0answers
47 views

Change the content of Countries.txt

I'm following the steps on this page: "https://github.com/mapsme/omim/blob/master/docs/MAPS.md", "https://github.com/mapsme/omim/blob/master/docs/INSTALL.md" When I run this line "omim / tools / ...
1
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0answers
201 views

Routing of OpenStreetMap with Qt and maps.me?

I'm following the steps on this page: "https://github.com/mapsme/omim/blob/master/docs/MAPS.md" and: "https://github.com/mapsme/omim/blob/master/docs/CONTRIBUTING.md" When I run this line "omim/...
1
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0answers
45 views

Some labels not being generated on map contours

I'm trying to produce a map using the latest QGIS incarnation: 2.18.11 After importing the UK OS contour data for one 100km grid square, I crop it using two contiguous polygons (1km squares). Two of ...
3
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0answers
75 views

Allow user to pan after once 'box' is draw in Openlayer2

I am using this example http://dev.openlayers.org/examples/draw-feature.html to draw a box on a map using 'draw box' checkbox option. Now I want , After drawing box I can be able to pan on map ...
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0answers
91 views

Unable to pan on map on a specific zoom level . Openlayers2 [closed]

I am fixing bug of a big application, In which after I cant pan over map but after zoom in I can pan. after again zoom out Its impossible. As I mentioned its big application so I cant post all code ...
1
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1answer
819 views

Updating OpenStreetMap maps database of own tile server?

I am working with a osm2pgsql database, and I do not know wheter I can use Osmupdate or not because in the StreetMapWiki it says furry-sansa should be used for osm2pgsql databases. The problem is ...
1
vote
1answer
703 views

Check if a Polygon Feature is completely enclosed by another GeoJSON features in OpenLayers 4

I have a map which is implemented using Openlayers 4. It loads a GeoJSON vector which defines the boundaries of a particular country. The user is allowed to draw and edit polygons to define subregions ...
14
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1answer
265 views

What is the meaning of this linear scale of angles on this 1951 map of Iceland from the U. S. Army Map Service (AMS C762)?

On the U.S. Army Map Service (AMS C762) 1:50,000 maps made of Iceland 1948–1951, there is a scale marking at the top which shows degrees, I suspect angles. In the image below it shows 25°–29°. It ...
-1
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2answers
343 views

Where to download high resolution maps or layers for Greece?

I am trying to create management zones on selected fields in Greece, so I am looking for high-resolution layers (maps) to use as a base (preferably satellite imagery). Could you suggest me the best ...
1
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2answers
12k views

Seeking offline map API like Google Maps for web? [closed]

I'm looking for an offline map API for web like Google maps (because I know I can't use this offline). I currently have a program (using js and node.js) that uses the google maps api and google roads ...
1
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0answers
235 views

Obtain elevation from a request lat,long with a map .tif

I am trying to get the elevation between two points in a route of Spain using APIs with HTTP request. I am using OpenStreetMap to get the routes, but I don't know how extract elevation with other tool....
1
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1answer
117 views

Does cropping and adding an alpha layer to a raster map yield better georeference results?

I have a collection of nine high-resolution map scans illustrating former borders between two nations. The scale is about 1:13,265 for each of the nine images. I want to georeference these maps using ...
1
vote
1answer
375 views

Align Raster with boundary shapefile: selecting right proj4 R

library(maps) library(mapproj) library(mapdata) library(rgeos) library(maptools) library(sp) library(raster) library(rgdal) Drawing inspiration from here https://stackoverflow.com/questions/10763421/...
2
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2answers
6k views

Keep customized colors with geom_polygon()

I have plotted a map of France with customized colors with map(): map(database="france", fill=TRUE, col=color) Results: (don't mind the two errors) and then I want to put this map with a ...
3
votes
1answer
445 views

How to make proportional signs on QGIS?

I usually use the proportional circles extension of QGIS but I need to have proportional pork or pigs according to the number of pigs per exploitations (it's a map about agriculture). How do I do ...
1
vote
1answer
187 views

Topographicmap.jpg convert to GPS readable [closed]

I have topographic map 1:25000 and I want that map to be GPS readable. So, is there any program for maps that can import this .jpg extension and to track my position in platform of this my topo map ? ...
4
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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 ...
1
vote
1answer
661 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 ...
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', ...
0
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1answer
163 views

LonLat values returning from Openlayers 2

I have developed an app using Openlayers 2 to retrieve the latitude and longitude values based on the clicked position. The map display the area of Great Britain and Northern Ireland. Below the ...
1
vote
1answer
43 views

Forming and Creating Town maps for Public Use [closed]

I have a keen interest in Graphics Design and have always wondered how town maps are created I assume it's a mixture of GIS and Photoshop/Illustrator. Anyone here of any experience producing these ...
5
votes
2answers
5k views

Does Google Maps Elevation contain buildings, trees, and other structures?

Does anyone know whether Google Maps Elevation data removed buildings, trees and other non-terrain related structures from its elevation data? I checked their pages, but couldn't find an answer to ...
1
vote
1answer
184 views

Change temperature range in thermographic map using QGIS

I need to know how to set temperature range from thermographic map to be from 100-120C using QGIS. In that case I would see just the temperatures from 100-120C.
2
votes
3answers
346 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 ...
1
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0answers
253 views

Muhammad al-Idrisi lake Victoria map 12th Century

Wikipedia and many other sources state along the lines of, "An excellent map, known as the Muhammad al-Idrisi map from the calligrapher (sic) who developed it and dated from the 1160s, clearly depicts ...
1
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0answers
261 views

How to set zoom on the basis of the road in Google maps API?

I worked out a similarity Project a Google traffic, I would implement the same Google traffic visualization about the Data Traffic What a depending on the zoom level displays them or hides them. For ...
0
votes
1answer
525 views

Leaflet - Leaflet.MarkerCluster.LayerSupport add/remove layers using external checkboxes?

I'm trying to implement the Leaflet.MarkerCluster.LayerSupport plugin following this example, however while it seems easy to add and remove data using buttons, there is nothing here to indicate one ...
1
vote
1answer
3k views

Writing SpatialLines objects in R

I used the function landgenreport from the package popgenreport in R to create an object result. This object is a list with various objects including SpatialLines class objects. I am trying to write ...
2
votes
1answer
26 views

Sheetsee optionsJSON problem

I am doing some basic work with G Sheets and Sheetsee.js library. I have it working as far as I get my coordinates showing up on a map. I'm using the demo-map file as my starter, I just changed the ...
6
votes
0answers
111 views

Scaling x y coordinates in qgis print composer while using atlas generator [duplicate]

So I am using QGIS 2.18.0 and have made a map template that uses the atlas generator in the print composer. It uses the grids settings for the map to add UTM north and Eastings along the sides of the ...
2
votes
1answer
950 views

Offline map in desktop application [closed]

In a win form I am getting location(latitude and longitude) by serial port and want to show this location in map but in offline mode. What is the best way to do this? I have a device which is ...
1
vote
1answer
49 views

GIS base map solutions [closed]

I'm new to GIS development, and am looking for a mapping solution for a web app. The map will be fairly complex with 4-5 different layers. I'm looking to convert shapefiles into a usable geo-coded ...
2
votes
1answer
102 views

Wrong coordinates on an old map

I'm trying to learn how to work a bit with Qgis for a part of a university work, and I'm facing some difficulties with an old map, and setting it up with the right coordinates. I have some old maps ...