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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
59 views

Mercator map coordinates transformation formula

I have a third-party application with a city map of size 131072x131072. There are data on this map which contains x and y coordinates. I want to transform these coordinates to latitude and ...
-1
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0answers
15 views

How many USGS 7.5 minute quadrangle maps are there for the contiguous United States?

Also, including everywhere else the USGS covers.
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0answers
31 views

Seeking software to show extent indicator from main map to inset globe? [duplicate]

I want to ask what software/GIS software do I have to use to create this nice-looking inset map (below picture) ? If I use QGIS, it will only allow me to create this kind of inset map (below picture) ...
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0answers
19 views

Error in 'merge aerostat data' function not found

Just a couple of codes with the same error at the time of merge data: FIRST CODE: library(eurostat) library(dplyr) library(ggplot2) library(stringr) fer <- search_eurostat("fertility") ...
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1answer
41 views

Mapping data: error in classIntervals: var is not numeric

When executing the 'classIntervals' command I got the error while mapping data from Eurostat. library(rgdal) library(RColorBrewer) library(sp) library(GISTools) library(classInt) library(maptools) ...
-1
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1answer
72 views

Aviation Overlay google maps

I would like to be able to display aeronautical charts high/low similar to flight radar 24 (Will attach picture). Is this possible please? Not sure where I can get them from.
1
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1answer
17 views

How to prevent Google My Maps from truncating lat long values

My Lat and Long coordinates get truncated from 37.747574 and -25.675669 to 37.74757, -25.67566 when I import them into Google My Maps. Is there a way to prevent this from happening?
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0answers
15 views

Adjusting Font Size and Page Layout for Map Export

I have been trying to publish maps with legend, scale bar and arrow. But after editing, when I add a legend, a scale bar or an arrow it is too big and I don't know how to bring it to an acceptable ...
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0answers
75 views

Add gridlines to projected map in R

I am producing some maps to include in a publication. However, I am not able to include a graticule on my plot such that it resembles that in the image shown below. The image is projected but still ...
2
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3answers
235 views

React Native - react-native-mapbox-gl vs react-native-maps

I have to develop apps with React Native for mobile that concern with mapping and found out there are two libraries for Native on this - react-native-mapbox-gl and react-native-maps. From github pages ...
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0answers
45 views

Getting Bike Lanes using Overpass Turbo

I am trying to write a query to get all bike lanes to display on a map for my project. I want to display all types of bike lanes(shared ,dedicated,tracks etc) [out:json][timeout:25]; // gather ...
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2answers
43 views

Geospatial export to PDF

I was wondering if someone can help me in the right direction to making a geospatial report. I used a drone to take aerial photos and used MME to stitch the photos together. I then uploaded the ...
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0answers
34 views

Combine two raster maps with transparency

I have two maps in geotiff format for exactly the same area with exactly the same geoinformation. The first one is a real land map, the second one is a satellite picture with clouds (rgba where alpha ...
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0answers
13 views

How to get my store locations which are withing 30 min drive distance using google map

I have the list of stores in my database. I want to show only those stores to a customer who can reach that store within 30 minutes (configurable) of drive. using google api
3
votes
2answers
123 views

Automating creation of multiple maps with different layers on same location in QGIS?

I was wondering if it is possible in QGIS 3.2 to cycle through different layers. For example, I have a workspace open with 3 raster layers (A, B and C). I would like to create 3 maps: Map A with ...
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1answer
119 views

Get Polygon boundaries of all cities or municipalities from whole country in GeoJSON

Is there a way to get geojson boudaries of all cities in a country ? The only thing I found is to find the geojson of only one city using this: https://nominatim.openstreetmap.org/search.php?q=Czech+...
2
votes
2answers
53 views

Cataloging small hardcopy map collections

We have a small collection of hardcopy maps, in the low hundreds, to catalogue and file into long term storage and are looking for lightweight guidelines and tools to do this in a way that will ...
0
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1answer
39 views

Possible/Feasible to download parcel map and add up to 20 layers

Novice who just downloaded and installed QGIS a few minutes ago. Currently reading about the functionality of QGIS but thought that I may be able to obtain immediate insight in reference to my ...
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0answers
18 views

How to change latitute and longitude after add distance matrix

How do I change latitute and longitude after adding distance matrix For example: latlang A = -7.827444,110.38432 latlang B = -7.827365,110.384338 distance = 20 m How to get new latlang A = ? How ...
1
vote
1answer
39 views

Create a shapefile of road edges for autonomous driving in ArcMap? [closed]

I'm using draw tool in ArcMap to create a shapefile i.e for road edges. I have been drawing on .las(3D) files. But I'm unable to retrieve the 'z' information to resulting shapefile. Can anyone please ...
1
vote
1answer
40 views

Shapefile licence agreement when publishing map made with R's maps package

I am submitting an article that has a map I made using R's data from R's maps package. I know that most shapefiles come with a license user-agreement or copyright information that accompanies the map ...
3
votes
1answer
52 views

Offsetting Atlas Generated Maps

My aim is to generate maps of polling stations to helps electors find their local polling stations for elections in 2019 and onwards. I've plotted and labelled 80 polling stations on a 'Polling ...
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0answers
117 views

Google Maps marker issue

I made a tracking application in which the admin device constantly sends coordinates to firebase and the user apps collects those coordinates to show marker on google maps, hence tracking the location....
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1answer
93 views

change ggmap to sp.: Create circle where radius represents distance (km)

I am trying to made multiple concentric circles of multiple radii in kms scaled to a map, similar this post was using the post here (ggmap: create circles). map.sp<-readShapeSpatial("C:file.shp") ...
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0answers
122 views

Weird lines on google maps [closed]

While I was travelling with my GPS "ON" and tracking my route I found this strange lines in pink and green dotted lines when I zoomed out the map I found that the lines where coinciding with the ...
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0answers
40 views

Additional vertical label on panel using spplot in R

I would like to plot a variable field for three future periods and for three RCPs scenarios. For this reason I use the "spplot" command in R and in every column I plot the future periods (2021-2040, ...
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1answer
137 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 .
1
vote
1answer
128 views

Problem deleting elements in map composer

I would like to make a query about the use of the map composer. Sometimes, when I add elements to the map, for example the scale bar, I have realized that I can delete it by pressing only the Delete ...
0
votes
1answer
67 views

Making a map with 8 different rasters of the same place but with only one legend in QGIS [closed]

I have 8 raster images of a farm that are changing with respect to time. I want to create one map as shown in the attached image which will show the 8 raster images with only one legend to represent ...
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0answers
21 views

Georeference correction of georeferenced ecw

I have a group of georeferenced ecw maps that I merged into one ecw. But when I compare same coordinates on this map and google earth and gis website for my country(a3.geosrbija.rs) it misses spot for ...
2
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0answers
204 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 ...
0
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1answer
76 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 ...
1
vote
1answer
90 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
81 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
votes
1answer
62 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
60 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 ...
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0answers
38 views

USGS EarthExplorer tiff and jp2 files for use with GPS Office Pathfinder v5.85

I've downloaded files in JP2 and/or GeoTIFF format from EarthExplorer for use in Pathfinder Office. For whatever reason, Pathfinder Office is not recognizing the GeoTIFFs - or more precisely, it's not ...
2
votes
1answer
727 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 "...
1
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0answers
40 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.
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0answers
2k 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
vote
1answer
987 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 ...
0
votes
0answers
179 views

How do I change the symbol of map points in a map generated using mapview?

I am using mapView to create an interactive map. Currently, all the points show up as regular filled in dots. I am looking for something similar to the pch command which allows you to easily specify ...
0
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0answers
63 views

2D maps with fading color points according to value

I was introduced to 3D plotting on maps (from shapefiles) using scatterplot3d. I can quickly create this (once I have imported the shapefile emilia and the data ozone1Jan13) by: s3d <- ...
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0answers
233 views

Simplify polyline based on zoom level with Google Maps API

I am wondering if it is possible with Google Maps API to make a polyline simpler (less points) in higher zoom levels. Leaflet allows this with parameter smoothFactor. If there is no such feature in ...
5
votes
1answer
396 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
votes
1answer
943 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
votes
2answers
179 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
46 views

Displaying single polygon with different colors at same time in ArcMap?

I have a feature class of polygons (Districts) and a table of program themes (Education, Health, Civil Society etc). A single district can have multiple program themes and a single program themes may ...
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vote
0answers
46 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 ...
0
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3answers
1k 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:...