Digital Geography

Show your Photos in QGIS and ArcGIS: a small example

Hi guys. Once again I found an interesting question in our Geoscientists group on facebook. One user wanted to show her photos in QGIS as she is it used from Google Maps: See a point, click on it and see the great image you’ve taken on your journey. Unfortunately the most obvious plugins failed to do it in QGIS. So check out our “at least” two usage scenarios for QGIS and ArcGIS where we will handle geotagged photos…

How to create a wind map in QGIS

A few days ago I saw Franz Leonardo’s post on the ArcGIS group on facebook: He visualised wind speed and direction in ArcGIS for a wind map and I thought by myself: let’s do it with QGIS… Here is the tutorial which covers some aspects of interpolation, symbol levels, classification and formulas…

how to create clustered points in leaflet

The leaflet API is very simple and tries to deliver best performance and style for commonly used features like tilelayers, points and lines and markers in general. So when we would like to visualize points it is possible to have a very large numbers of points. So lets have a look on such an basic example. I’ve created a point shape file with QGIS which has approx. 1.000 points embedded. Let’s have a look on a normal webmap with this density of information: As you can see, we’ve inlcuded a second js file with the point information called points_rand.js. You…

importing shapefiles in Python

Python is a very common scripting language which seems like a swiss knife for programming. This is the reason to use it as a framework for the program “where are your customers“. In this context I need to import the shapefile into Python. Therefore the guys at geospatialpython present a nice module to import shapefiles into python. First install the file using easy-install/pip. Therefore open the terminal:

geocoding adresses

One thing I have never kept in mind is the divergence on how shops and agencies store their adresses (more or less like John Doe, 123, Main Street, Anytown, U.S.A ) and the way we store our point-informations (103°E, 45°N). So one problem is,to bring these both things together. YOu cannot do this straightforward because you need some kind of reference like a georeferenced and digitized or u use such thing like the googlemaps-API. ArcGIS is also capable of translating this information into points. Just watch the following tutorial and I’ll show you how: