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Questions tagged [mapping]

The act or process of making a map.

0
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3answers
28 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
vote
0answers
18 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
votes
1answer
24 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
vote
1answer
31 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 ...
0
votes
0answers
34 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 ...
1
vote
2answers
420 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 ...
0
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0answers
27 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
76 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, ...
-3
votes
1answer
60 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
vote
1answer
26 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
0answers
48 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 ...
1
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0answers
28 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, ...
-1
votes
1answer
61 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
0
votes
1answer
70 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
42 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
28 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
56 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
117 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 ...
1
vote
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
votes
1answer
47 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 ...
0
votes
0answers
14 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
53 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 ...
1
vote
0answers
76 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
83 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 ...
0
votes
0answers
53 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
votes
0answers
165 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
58 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

How to use custom icons for Leaflet Layer groups

Ok, 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
252 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
33 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
217 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
114 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
238 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
vote
0answers
31 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
153 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 ...
-1
votes
0answers
85 views

To plot temperature variability for a range of latitude and longitude in QGIS map

I am new user of QGIS. I have a data set of temperature per latitude and longitude for a certain island and want to plot the temperature variability within this island. My length of coordinate for ...
0
votes
1answer
51 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 ...
15
votes
1answer
889 views

Examples of cartographic 'jokes'

In the July 2017 edition of Swiss Review, a publication for Swiss living abroad, the cover feature was on Swiss Cartography. With my interest in GIS this obviously sent me straight to the article. ...
2
votes
3answers
349 views

Ggplot: Incorrect aspect and map position for northing and easting shapefile

Stats Canada released new census data in false northing and easting format. The shapefile from 2011 on long/lat format worked fine, but now the map is rotated and distorted. The code below downloads ...
3
votes
2answers
252 views

Small coordinate offset on QGIS using CRS ETRS89 / UTM zone 30N

I'm currently trying to produce simplified field slips on QGIS for an undergraduate mapping project in Villamanin, Northwest Spain. I've imported vector map layers from the download centre from the ...
0
votes
0answers
54 views

Mapping lat/lon to zip code level or climate region level

I have a CFSR 30-year climatology .nc file. I could read in the file and get lat, lon , date and temperature. Now I need roll up these information to a zip code then later to climate region ...
3
votes
1answer
279 views

Adjusting position of individual graduated symbols in ArcMap?

The house symbols in the map are overlapping each other. Is there any tool in ArcMap that I can manually move symbols individually?
1
vote
1answer
554 views

Conversion of files to Mapsforge *.map format [closed]

I am a complete newbie and not a cartographer. I organize off-road events such as 4X4 trail rides, biking events and running events. Many of these trails/event maps have been created in different ...
-4
votes
1answer
2k views

Generate flood map using qgis [closed]

How can I generate a flood inundation map and flood depth using QGIS within 3 hours?
1
vote
0answers
153 views

Calculating a proper region with insets for my MapView

In my app I'd like to create a snapshot of a Map and as I have a custom tile-source I need to create that on my own. I am currently stuck creating a proper region that fit's a track I want to display. ...
0
votes
1answer
216 views

Plotting contour map of modeled pollution data in QGIS? [closed]

I'm a complete beginner to GIS, and I'm trying to create a filled contour map of pollutant concentration data for an area of NSW, Australia. I've calculated the modeled concentrations of the ...
4
votes
1answer
166 views

Generating an irregular polygon buffer around a line in QGIS

I want to create a cartographic effect to represent a hiking trail. I thought that it may look cool to generate an irregular buffer around the line representing the trails so it looks more "natural". ...
1
vote
0answers
97 views

Generalize raster data dependent on DEM?

I'm working on a generalization process of probabilistic calculated raster data (rockfall extend, data shows probability of being hit by a rock in %; I used binary data, 1 for "one hit or more", 0 for ...
0
votes
1answer
1k views

googlemutant and leaflet problem view data

I just create a new map with leaflet and GoogleMutan with this three CDN libriaries: 1) maps.googleapis.com/maps/api/js?key=MYKEY" async defer 2) unpkg.com/leaflet@1.0.1/dist/leaflet-src.js 3) ...