Questions tagged [mapping]

The act or process of making a map.

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23 views

High resolution and reasonable cost RGB satellite images

I want to obtain high-resolution RGB satellite images with reasonable cost for Pakistan. The objective is to guide tourist on high-resolution GIS maps. Google Earth does not have very high resolution ...
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11 views

ArcGIS Python API Plotting ValueError: setting an array element with a sequence

Got a pandas spatial df using ArcGIS python API. The data is read in via pd.DataFrame.spatial.from_featureclass()–i.e., a shapefile. Once loaded, df has a SHAPE column, as you see here. Next, ...
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1answer
60 views

Thematic map made in QGIS [on hold]

I made a thematic map of carbon stock in Russian Federation in 2017 year. I am not a cartographer and geographer at all. Tell me please what should I do with this map to make it more professional? ...
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13 views

Changing pixel values by the average of neighbours in raster calculator?

I have a raster with values in each pixels. I need to change each pixel by the average of surrounding pixels. For example in the first row first column , the pixel value will be replaced by average ...
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8 views

Path Finding for Polygonal Map Representation

I'm figuring out a way to find the shortest path given a source and destination. My map is a building's floor plan. And I represented my map using polygons like of below: class Polygon(){ String ...
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33 views

How to get a grid 500m x 500m on map composer

I need to make a map on map composer, with a grid layed on it which is 500m x 500m. however the only way I could find of doing this was by adding a grid to my map, found within item properties. This ...
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11 views

How to plot Geoserver data (point data) as image on the map instead of vector plot? [closed]

Need the help to integrate it with angular 5 if possible.
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1answer
24 views

Hub and spoke map

I have a bunch of addresses located in a city, there is a central location which is the hub and I'm looking to create a hub and spoke map with lines coming from the hub and going to every point on the ...
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10 views

Add more maps to Garmin Southern Europe

Is there any way to add maps of Eastern Europe to Garmin Drive 40 Southern Europe. When I connect the device with Win 10 PC, so I can download some of Eastern Europe, there is that menu with labels ...
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2answers
46 views

QGIS changing map options distance units

I want to change the map distance units option in QGIS from metres to centimetres. I am currently using projection British National Grid EPSG 27700. I would like the print composer to print a map ...
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1answer
20 views

Map that automatically zooms out [closed]

Suppose I have an online store in San Francisco, California. Most of my customers are from the Bay Area, but I do have some customers from the rest of the U.S. For my analytics platform, I want to ...
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1answer
54 views

Mapping with time frame symbology in QGIS?

I am using QGIS 3.8, and I am making a map of archaeological sites. My table looks something like this: NAME - Coordinates X - Coordinates Y - Site_type - Data_type - Century_begin - Century_end ...
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1answer
33 views

How does a LiDAR placed on a moving vehicle map the distances?

Please correct me if I'm wrong but LiDAR device shoots out multiple laser rays and maps the surroundings based on the time taken by the rays to reflect. But if the LiDAR is placed on a moving vehicle (...
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2answers
57 views

Why is the order of my features changed when using readFeatures in OpenLayers v4.6.5?

I have a geojsonObject that is a featurecollection of X number of features. see picture I Then add this to a vector: var Source = new ol.source.Vector({ features: (new ol.format.GeoJSON())....
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25 views

Earth Engine Image Collection Reduction Glitch

I am having a visual glitch when adding an image as a band to the map. The glitch consists of a vertical line which is not rendered at all. The more I zoom out of the map, the more this line increases ...
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1answer
99 views

How to connect multiple cities on a map using MapQuest route API

I am working on any optimal vehicle routing problem. I want to start map routing on the road starting from one city A to city B to City c to city D back to city A Based on lat/lng of these cities ...
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1answer
39 views

OpenLayers, problem with WFS service and “outputFormat”

I have a service and I tried to paint his layer on my map: http://www.ign.es/wfs-inspire/unidades-administrativas?REQUEST=GetFeature&SERVICE=WFS&VERSION=2.0.0&COUNT=1&srsName=EPSG:...
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2answers
49 views

Sorting MXDs with specific attributes and exporting to specific directory?

I'm working on creating a GP tool that simply exports all MXDs in an input folder into an output folder as PDFs. This actually works, but I messed something up with output directories. I coded ...
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1answer
26 views

Changing map symbology with arcpy?

I've written a program that maps out a specific point file of interest. The program produces a map (clipped map attached below) but I can't figure out how to change the symbology to different colors. ...
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0answers
15 views

Encode MapServer tile pixels with data values

Is it possible to encode values from raster bands into pixel output using a MapServer .map file? More and more I'm finding that a commonly adopted method for moving geographical data for rendering ...
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0answers
29 views

Searching styles for indoor maps

I have data that represents Airport floor plans stored in GeoJSON format. Are there any standards, guidance, or good practices for Indoor Maps Styling? Any references or resources would be useful.
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1answer
28 views

Attach the bar's bottom to a location in 3D Cesium

I have the code below on web site cesiumjs. Is there any way that I can fix the bar's bottom at the location (37.786805,-122.45475) on the Earth's surface? The bar here looks like its bottom moves ...
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1answer
77 views

Any Open Source Web Mapping App importing ASCII grid?

I'm using QGIS were its easy to import my noise mapping data through a raster layer file in ESRI ASCII (ASCII grid) format. I want to do the same online, without exporting from QGIS, because I want ...
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34 views

Creating a Predominance Visualization in QGIS

This is what I'd like to replicate. I'd like to show the dominant category for each region. Like the author, I also have 6 categories to show (languages). Here is the article that is explaining his ...
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1answer
67 views

QGIS - exporting shapefile to convert to .JSON for use in PowerBI

I'm trying to export a shapefile I've been using in QGIS for use in PowerBI because PowerBI only supports .JSON extensions. So I've been converting them with mapshaper.org. This is my shapefile result ...
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3answers
125 views

QGIS 3.0 - Creating a dot map with multiple categories

I'd like to create something almost identical to this: I'd like to display what languages are most spoken within each neightbourhood. My data has 6 languages. Is this possible for a novice like ...
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0answers
43 views

Visualizing values on map in QGIS [closed]

I have a world map shapefile with the country boundary. I want to represent my data associated with specific countries. The values are to be represented in a colour graded manner along with ...
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3answers
2k views

OpenLayers plugin in QGIS 3.6

I can't find OpenLayers Plugin to install in QGIS 3.6. I want to open Google Earth in order to add coordinates and open satellite image to start mapping.
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1answer
40 views

Is it possible to see the selected geometry in the map composer? And change the appearance of them?

I have QGIS 3.4.4 Madeira. I would like the selected geometry to be seen in the map composer, but I can't find the way to do it. Also, I would like to change the appearance of the selected geometry, ...
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1answer
70 views

QGIS color map format

What is the correct color map format (.txt) for a color map I want to load in the Raster Layer Properties/Symbology menu of QGIS (v. 3.6.0)
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42 views

Whats your favorite map projection for [closed]

What is your a nice projection for the southern Atlantic? S.America & W. Africa? I'm looking to produce nice maps with little distortion on shapes. Leaning toward Lambert.
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1answer
56 views

Creating coordinate points based on polygon

I am trying to create coordinate points based on a polygon that I've created in Google Maps and imported into R as an sf object. Specifically I have sample points of physical samples I've taken, but ...
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0answers
24 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 ...
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1answer
40 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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1answer
30 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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74 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
28 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
30 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 ...
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1answer
83 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
164 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
40 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
29 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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1answer
356 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
813 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. ...
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0answers
29 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 ...
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1answer
74 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,...
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1answer
81 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
120 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
442 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
67 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. ...