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6 answers

Changing Data Source of Layer in QGIS

Is there a way to source a shapefile to a layer file in QGIS much like how you do this in the properties of an ArcGIS layer? (i.e. Go to layer properties, source tab and then just depress the 'Set Dat Source' button) I've been all over the layer…
Mike
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4 answers

How to add text-only labels on Leaflet map with no icon

I'm looking for a way to show text on Leaflet map using markers or anything else without showing any icon. I want to show text only and be able to style and rotate it... Any suggestion?
Etienne Desgagné
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31
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6 answers

Convincing organization to move towards Open Source GIS?

After spending the better part of the year on this site I am seeing how big the open source GIS community is. I used to just think it was ESRI and nothing else. That said, how do you begin to nudge or convince others that open source programs might…
Craig
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31
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7 answers

Calculating intersection of two Circles

I'm trying to figure out how to mathematically derive the common points of two intersecting circles on earth's surface given a center Lat/Lon and a radius for each point. For example, given: Lat/Lon (37.673442, -90.234036) Radius 107.5 NM Lat/Lon…
Will
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31
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9 answers

Effectively displaying demographic data on a printed map

I would like to plot the following per zone (30 zones total) data on a printable/non interactive map: Average age Average household income Number of households Population density Number of people Number of workers How would you display the above 6…
dassouki
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31
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5 answers

Converting ArcGIS layer style to Styled Layer Descriptor (SLD) file?

I am putting together a GIS server using GeoServer and need some help with importing my layer styles from ArcGIS 10 to SLD format. I have one layer in ArcMap properly symbolized and labeled, how can I get this layers symbolization and labeling…
Furlong
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31
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2 answers

Benefits of Multipart Features?

Multipart points, lines, and polygons are implemented in nearly every GIS, but what benefits, if any, do they provide? In a relational database attributes shared by different features can be stored once, and IDs used to link them to separate…
geographika
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31
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8 answers

When is a 3D Visualisation in GIS Useful?

I can currently only think of two cases: to visualise potential changes in a landscape, such as the effect of adding windfarms, or the addition of a new building to an urban area. However both these examples are often done using CAD packages. to…
geographika
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31
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3 answers

Accessing feature classes in file geodatabases using Python and GDAL

I am trying to access a vector dataset in an Esri File Geodatabase using Python and GDAL. I have successfully compiled GDAL with the file geodatabase API. The FileGDB driver is working correctly since entering ogrinfo --formats shows the FileGDB…
Niels
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31
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3 answers

Map material from China not allowed to leave that country

I just read an article about a company in Germany which tests autonomous driving cars in different countries. They state that they analyze all of the generated data in Germany - with one exception: China. Because of legal regulations, no map…
TimSch
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31
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3 answers

OpenStreetMap content in commercial applications

I was considering the use of the OpenStreetMap API to retrieve vector features and combine them with other source data through a commercial tool. However, OpenStreetMap uses the Creative Commons Attribution-ShareAlike 2.0 (CC-BY-SA) license for its…
Jaime Soto
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31
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1 answer

numpy array to GTiff using rasterio without source raster

I have a numpy array that represents rasterized data from a LiDAR point cloud. For example: import numpy as np import rasterio arr = np.random.randint(5, size = (100, 100)) I know information about this rasterized data already, such as the pixel…
Bryce Frank
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31
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6 answers

Installing QGIS3 on Mac?

Kyngchaos installer is not finding python3. I installed python3 using HomeBrew and is not located at /usr/local/Cellar/python/3.6.4_4/Frameworks/Python.framework/Versions/3.6/bin/python3.6 How do I tell the QGIS installer to recognize that python3…
Greg
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31
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2 answers

Joining several raster files using QGIS?

I'm new to QGIS. How can I combine multiple raster layers into one layer? The raster images are of different areas with very little overlap. The goal is to bring numerous town plats into one project.
Neil Morgan
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31
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8 answers

Using ogr2ogr to convert all shapefiles in directory?

I have a directory with several shapefiles. How can convert all these shapefiles to MapInfo with ogr2ogr? I know how I can convert one file. And I can make a batch script writing a line for each file. But isn't there an easier way to convert all…
Stefan
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