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Questions tagged [mapping]

The act or process of making a map.

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11 views

Carto Maps: Display different points/objects at the same location

I know this question has been asked before, but I could not succeed with the help of the answers that are already out there. Can someone provide me with a detailed description (for dummies that cannot ...
0
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1answer
33 views

Update info on a div when map on touchend

I want to update a div with information when I touchend the map on my iPad or iPhone. The information div run correctly with a click version but for a touchend I had to use map.on map.on('touchend', ...
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0answers
52 views

How to create a map for a website which can be edited and updated easily? [closed]

I would like to create a map to go onto my company's website showing all the sites we work at across the country. The map needs to be interactive so when a site is clicked on, more information pops up....
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1answer
14 views

Plotting Geographical Grid from Long/Lat Coordinates in R

I have a file of coordinates (Long/Lat) that should enable me to plot a series of 10km grid squares covering the UK. However, for each grid square I have five sets of coordinates by way of plotting ...
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0answers
27 views

Use openrailwaymap offline

I have a one question: it's possibile to create an offline map of openrailwaymap? I would create an offline map using openstreetmap and after add the openrailwaymap layer...
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1answer
19 views

Not found the code for a map R animation

I tried to make an animated map in R with tmap package, like here https://geocompr.robinlovelace.net/adv-map.html#animated-maps I tried to find the code for the animated map presented in section [8.3 ...
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1answer
23 views

Confusion regarding topojson Polygon coordinates

I have a topojson file which represents a hexagon. A hexagon has 6 vertices, so I was expecting the arcs attribute of topojson file would contain 6 points, but it contains 7. I wanted to know why ...
0
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1answer
41 views

Multiple attribute maps in R?

In pursuit of replicability (as well as requirements of funding agency), I am trying to produce all of the maps for a current project in R. For single attribute maps, so far so good! I am using ...
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1answer
59 views

Creating Bivariate choropleth map a.k.a. Relationship map in QGIS [duplicate]

There is one polygon layer with the number of "immigrants" and "emigrants" respectively. I want to visualize those two values together. Diagram with both normalized values is not an option because the ...
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0answers
26 views

Algorithm to optimally split a map comprising many separate areas into panels for printing

I have a map of set of land parcels (polygons) that need to inserted into a document. Some of these polygons are contiguous, but some can be scattered randomly. The area is typically too large for a ...
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0answers
13 views

Display shapefile on map and create shapefile from polygon coordinates [Android]

Im creating application where I use Google map and I need to display shapefiles on it. What are the solutions to display shapefiles over Google map? Another thing is that I am drawing polygons on map....
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0answers
20 views

Bar Chart Legend

I am trying to add legend to a map with bar charts which would be meaningful. The default legend doesn't explain the size of bars on the map. I have tried this one: https://www.esri.com/arcgis-blog/...
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0answers
117 views

How to enable jupyter nbextension for ipyleaflet

I was trying to test out this script https://github.com/tylere/PyDataNYC2017/blob/master/ipynb/satellite_analysis.ipynb but got stuck at the iteractive mapping part. import ipyleaflet map1 = ...
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3answers
223 views

Filtering interactive leaflet-map with dropdown-menu?

I try to set up a filterable "shot chart" like http://graphics.latimes.com/kobe-every-shot-ever/ with leaflet. I've a geojson file thats stores all the shots data, I've them showing up in a layer. ...
1
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0answers
22 views

QGIS Atlas Feature for multiple polygons with same attribute [duplicate]

I have a shapefile of city blocks in a given city. Each polygon represents an individual lot, but the attribute table includes a column called "sector", that denotes the zone of the city that the lots ...
0
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1answer
34 views

R and Mapview: How can I chose different colors for different layers?

Here is an example: library(sp) library(mapview) data(meuse) d<-st_as_sf(meuse,coords = c("x","y")) d1<-d[sample(nrow(d),20),] d2<-d[sample(nrow(d),20),] mapview(list(d1,d2)) Both layers,...
1
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1answer
46 views

QGIS- how to prevent layers from appearing in legend on composer

My laptop (Lenovo x1) usually crashes When I add legend to a map composer in QGIS (QGIS 3.2 BONN). Problem is that all layers in the project will be "auto-updated" to the legend and this will get my ...
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0answers
65 views

How can I generate a series of maps from time series data in QGIS3?

I've got a polygon layer containing some time series data in cells and I'm trying to create a series of maps from it. Data structure: every polygon has a timestamp and a value that I'm displaying on ...
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2answers
431 views

How are satellite images mapped to terrain coordinates so precisely?

Many geoinformation systems have both satellite images and terrain features (houses, roads, etc) with coordinates. So they can show terrain features drawn over the satellite image or they can display ...
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0answers
37 views

Digital Soil Map of the World [duplicate]

I have downloaded a digital soil map of the world from: https://worldmap.harvard.edu/data/geonode:DSMW_RdY It has lots of files in it with different endings (shp, sbx, xls etc.). I am using QGIS 3.4. ...
0
votes
1answer
121 views

Downloading map tiles/image from website

There are two Norwegian websites that have satellite imagery I need, https://kart.finn.no/ or https://www.norgeskart.no . Is it possible to save a certain area when zoomed out so the scale is 200m, ...
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1answer
66 views

Has online map-based software for survey been developed? [duplicate]

For my research, I need to ask respondents to indicate on a map where they think crime happens. I think of this as a digital solution to physically dropping pins on a map. Is there an online software ...
1
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1answer
31 views

How to add multiple layers to SAGA map view at the same time?

I need to visually interpret more than 50 grids, so I want to add them all to a SAGA map at the same time. If I right-click on a single layer, I can "Add to Map", but with multiple, this option is not ...
0
votes
1answer
88 views

Map Coordinates have negative values

I have created a map in QGIS with 4 vector layers with the CRS of (EPSG:28356, GDA94 / MGA zone 56) The map is of the Robina area on the gold coast Australia. I have added map coordinates and the ...
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0answers
38 views

Animation of Faceting maps with tm_facets

I am unable to get the facets for 3 years of provincial GDP of provinces of China. My data is as follows. structure(list(Pr_mlnyn = structure(c(2L, 27L, 10L, 25L, 19L, 18L, 17L, 11L, 24L, 15L, 31L, ...
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1answer
76 views

Remove rectangles from Leaflet map

I am drawing a Leaflet map. I also want the ability to add the coordinates via a form. How is that done? leaflet map
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1answer
207 views

Extract coordinate data from KML path

I have a route defined by a series of waypoints - how can i extract as many coordinates as possible from that route as possible? I need to extract about 100-150 coordinates that lie along a route ...
2
votes
1answer
50 views

How do you turn coordinates vertical in Map composer?

When using map composer in QGIS, there is the option to `Draw coordinates'. once selected, the coordinates are situated in the horizontal position (as seen below). Does anyone know how to align the ...
3
votes
1answer
29 views

ArcGIS 10.2.2: How to display attribute values using a representative number of symbols?

I am using ArcGIS 10.2.2 Advanced. I want to produce a map where the value of attributes in each polygon is shown by a representative number of symbols in each polygon. I have used Quantities > Dot ...
0
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0answers
84 views

Highlighting map areas through map legend using Leaflet?

I would like to highlight different areas on a choropleth map when the mouse over the legend using Leaflet, but my code is not working: <head> <meta charset="UTF-8" /> <meta ...
-1
votes
1answer
172 views

Making new map using QGIS? [closed]

I'm new using QGIS. I have been searching for information, a manual or a workbook that shows me how to make a map like this. I require the same map but with other division and new data. I have been ...
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0answers
29 views

ECW Exception when exporting a map in QGIS

Since monday Qgis has been unstable, everytime I try to export a map (or worse an atlas) it has crashed. I get the folowwing message : --------------------------- ECW Exception ---------------------...
0
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1answer
92 views

Simplifying a SpatialPointsDataFrame in ggplot world

I've been working on a map showing lines running across Europe. Each line is coming from a GPX file, parsed in like so: spdf <- readOGR("data/file.gpx", layer = "track_points") Now, if I plot the ...
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0answers
19 views

Unable to view previously published AGOL Map Image Layer

It's been a while since I've worked with AGOl and map image layers. I'm in the process of republishing several Map Image Layers to a new server. The issue I've been having involves not being able to ...
2
votes
1answer
86 views

Colour Gradient as background colour in textbox for map in QGIS

I'm trying to make a map in QGIS which of course contains the title of the map within a textbox. As background colourscheme for this textbox, I want to use two colors with one color beginning at the ...
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0answers
116 views

Leaflet sidebar-v2 not floating display on mobile

I don't want the sidebar to always fill the entire vertical side, solved that by adjusting the height of the .sidebar.collapsed However, when on a mobile device it still fills the entire side ...
0
votes
1answer
127 views

Calculating coefficient of variation from gstat output to create uncertainty map in R

I was asked by my supervisor to create uncertainty maps of kriging interpolation based on the coefficient of variation ((sd/mean)*100%). I used krige function from gstat package to perform the ...
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0answers
63 views

Coordinate background colour using Print composer in QGIS

How to add coordinate background in Print composer? Example in attached picture with coordinates, which is not quite visible.
2
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0answers
190 views

Creating heat map with fixed max color value in QGIS?

I am trying to create a heat map using raster data in QGIS 3.0. I have made them previously in ArcGIS pretty easily, but I am having difficulties in QGIS. The difficulty I am having is setting a fixed ...
2
votes
1answer
85 views

Trying to convert tiff+tfw to mbtiles. Projection issues?

I have quite a number of huge TIFF files, each TIFF file has a TFW file associated. gdalinfo shows that the TIFF files are not real GeoTIFF (no embedded data). I know the TIFF's are in WGS84, UTM ...
2
votes
1answer
1k views

Using custom icons for Leaflet Layer groups?

I have searched posts and tutorials and could not find the answer to my specific application of this feature Almost all the examples use L.marker to simply place a marker on the map using various ...
2
votes
2answers
297 views

Creating evenly spaced grid for QGIS composer to show overlap in Map?

I would like to create an evenly spaced, overlapping grid so that I can use the QGIS ATLAS to display a large mapping extent with a little bit of overlap between each image of the Composer. I am ...
0
votes
1answer
37 views

Changing Carto basemap according to timestamp?

I'm making an animated "time-map" of the avaibility of renting bikes during a day (on Carto). Can I change the basemap so when it's day time the basemap is light and when it's night time the basemap ...
1
vote
2answers
282 views

Why North direction is shown in red color on aspect maps?

I have been recently exposed to an aspect map that looked like this: I wonder why North-y orientations (N, NE, NW) are shown in red and orange while South-y orientations (S, SE, SW) are shown in ...
2
votes
1answer
129 views

Changing the band for contour lines?

I am making contour lines for a NetCDF file for sea surface temperature and the contour lines display the first band only (bands represents different dates). Theres few 100 bands in the NetCDF, how do ...
4
votes
1answer
332 views

Missing features from featureCollection in Google Earth Engine but present in Fusion Table

I am using google earth engine code editor to extract some band values at specific point locations. To do so I have loaded my .csv file with point IDs and coordinates into Fusion Tables and the Map ...
1
vote
1answer
1k views

R tmap package: basemap not working

I want to use the package tmap to plot a simple shape with a basemap (e.g. OpenStreetMap). According to the help page of tmap this should be able by using tm_layout(basemaps = c('OpenStreetMaps')) ...
1
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0answers
39 views

Tenant Basis Geo web mapping using geoserver

I have to visualize huge public data of my merchant of their store data. where each merchant is one tenant and they are having their own data which we are rendering using GeoServer with each tenant ...
1
vote
0answers
168 views

PyQGIS standalone app remove/swichoff layers in the legend

I try to swich off remove layers from a legend in a qgis standalone application (QGIS 2.18) and found that the one way is to manipulate the QgsLayerTreeGroup (GIS.SE 142016). # remove two unwanted ...
0
votes
1answer
52 views

Layers left off when running python via Windows Task Scheduler

My python script generates a number of PDFs from different mxds. If I run the script from Pythonwin everything works great. When I run the script via windows task scheduler it leaves off layers that ...