Questions tagged [mapping]

The act or process of making a map.

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6 views

combine two images in google earth engine

I want to combine these two images. so I do not need to open two maps to work. It takes forever to play with two maps. This is main map(colourful one). range : 0 - 17 var all_sld_intervals = ...
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39 views

Analysing polygon layer using QGIS

I use QGIS. I have two sets of data. One of them came from a brand of a combine that compiles the harvest data in a point map. I can analyse that easily using the random point selection and basic ...
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1answer
47 views

Creating automated maps for attributes in QGIS

I understand that automated maps can be created using information in the attributes. I want to stop manually creating each map for land owned/managed (this is coded in the attribute tables). How do ...
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1answer
35 views

QGIS 3.4 set transparency only for some layers below

I‘m working on a geomorphological map of a river and its sourroundings. As a base I have a topographic map and a DEM for the pre-mapping. The topographic map is not accurate enough in the river gulley,...
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39 views

How to find shortest path by sea from startpoint a to endpoint b [closed]

Have implemented an algorithm which find a shortest path from start point [37.937187, 23.619259] to end point [-23.01231999999999, -43.134443000000005].. But array that I get as result is a path that ...
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25 views

Exporting map error - QGis

Whenever I try to export a map as an PNG image I get the 'successfully export' message but there is no file generated. The error happened in Zanzibar so I changed to Noosa but I still can't export the ...
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15 views

How to calculate the bounding box of a map, given the pixel width/height of the container map & a bounding box which is included in the container map

How can I calculate the bounding box of a map, given the pixel width/height of the container map and a bounding box which is included in the container map? I know how to do this with Google Maps ...
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1answer
31 views

I need to work with 64-bit ArcMap [closed]

I work with 64-bit Bentley WaterGEMS and it uses 64-bit Microsoft Access Database Engine. Opening XLSX files in ArcMap (via Add XY Data ...) needs 32-bit Microsoft Access Database Engine. Both 32 and ...
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21 views

Correctly displaying structural data in different map projections

How can I ensure the correct display of oriented structural data in GIS at northern latitudes when the map is reprojected. We are making new geological maps in northern latitudes and have a lot of ...
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2answers
69 views

How to make a fictional city map? [closed]

I'm currently making fictional city for my novel project, and I need a tool for making city map. I tried Adobe Illustrator, but it'll be quite hard labeling each streets, parks, buildings etc. I saw ...
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22 views

Natural Earth land in GeoServer: line cut through Antarctica for EPSG 900913

I have created a GeoServer layer (GeoServer 2.15) that contains the 10m resolution Natural Earth land countour shapefile data (https://www.naturalearthdata.com/downloads/10m-physical-vectors/). But if ...
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26 views

Stop Grid Coordinates Overlapping in Print Layout

I have created some data driven pages in the print layout (controlled by atlas) using QGIS 3.4. The grid spacing is set to a fixed interval (20m). This works fine until one of the pages is located in ...
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22 views

Error while rendering Leaflet map on Shiny

I have been trying to reproduce a Leaflet map on a Shiny webpage. I have made this code so far: library(shiny) library(shinydashboard) library(leaflet) library(rgdal) library(dplyr) library(DT) Map &...
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27 views

Calculating Center (GPS Point) and Radius (km) of n GPS points

I'm new to GPS and position mapping but i have a background in programing and some of the math related to it. I've been tasked with writing a small golang program that takes n GPS points (DMS) and ...
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20 views

Static map image with markers and labels

I need to create a image automatic way of a map with markers custom and label with 5 characters, I tried with the API Google Maps static but only one character is leted. Mapbox let me use maki icons,...
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12 views

ImageElementOverlay has no click events?

After using ImageElementOverlay, I found that there was no click event for ImageElementOverlay,But I don't know. function stamp(s) { var imgW = 521 / 1000; var x = parseFloat(s.x*imgW); ...
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12 views

3dm data disappears after rotating layout in QGIS

I ran into a bug (I suppose) recently. After loading a *.3dm format mesh (triangulated irregular network with elevation data), with the Layer --> Add Layer --> Add Mesh Layer command, I put some data ...
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1answer
49 views

High resolution and reasonable cost RGB satellite images [closed]

I need 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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14 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
77 views

Thematic map made in QGIS [closed]

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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1answer
30 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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38 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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13 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
41 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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2answers
51 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
22 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
56 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
64 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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26 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
131 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
43 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
50 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
30 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
16 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
33 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
29 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 ...
2
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1answer
98 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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40 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
132 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
167 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
3k 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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2answers
57 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
93 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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43 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
67 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
41 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
61 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 ...