Archive for the ‘Uncategorized’ Category

Open GIS for the Developing World (PDF)

July 9, 2018

Open GIS for the Developing World

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

This work was made possible in part by the GIS labs and support staff of the Middlebury College Department of Geography, the Middlebury College Faculty Research Assistant Fund, the GIS Teaching Fellows Program, and the research assistance of Hayden Shea.

Reference: Holler, J. (2015). Open GIS for the Developing World: Term Project and Lab Assignments. Retrieved from



July 9, 2018


Network analysis in Python

June 3, 2018

Network analysis in Python

“Finding a shortest path using a specific street network is a common GIS problem that has many practical applications. For example navigators are one of those “every-day” applications where routing using specific algorithms is used to find the optimal route between two (or multiple) points”.

Automatic Generation of Walkable Paths in Buildings to Support Indoor Wayfinding (PDF)

June 3, 2018
Automatic Generation of Walkable Paths in Buildings to Support Indoor Wayfinding
“Abstract -We have created a prototype system that generates walkable paths in a building using AutoCAD floor plans. Our system is designed to work with the CampusGuide, a commercial indoor navigation system. Path-generation is done once for each floor plan, creating a network of walkable paths between all points of interest. The A*algorithm we have implemented takes roughly fifteen seconds to build paths for a

building floor, which is much quicker than what a human can do manually. The error
rate is fairly low, but still an issue for commercial use”

Mapping Coffee Shops+ Walkability

June 3, 2018

Mapping Coffee Shops+ Walkability

“In every city, you will find what we call “third places”, a type of environment allowing citizens with no particular affiliations to comfortably meet. If the home (first place) and the workplace (second place) are the usual social environments, third places provide another needed option. In his book “The Great Good Place”, urban sociologist Ray Oldenburg argues the necessity and importance of these three realms in our living environment in order to achieve a healthy and balanced life”


June 3, 2018

Open data heritage and smart objects to create the new digital ecosystem

The SmartDataNet project is the result of a call for tender launched by Piedmont Region in collaboration with CSI Piemonte.

Smartdatanet allows you to share and aggregate information produced by different services to create new applications, creating more intelligent and sustainable communities.

The flow of data is generated by Internet of things (such as cameras, traffic sensors, weather stations) and Internet of people (such as tweets, or smartphones’ signals).

It is a system interconnecting objects and people and aiming to improve the knowledge and analysis of our lives within complex environments.

The technological pillar of the ecosystem is represented by YUCCA, an open source platform oriented to the acquisition, sharing and reuse of data resulting both from Real Time and on-demand applications.


Slippy map tile generator for QGIS

May 29, 2018

Slippy map tile generator for QGIS

“This program is a slippy map tile generator for use with QGIS. All rendering is done by QGIS so what you see on your screen is what you’ll get in your output tiles. Functionally it is quite similar to the QTiles plugin. Here’s a comparison of the two:

Advantages of this program

  • All styling is done using QGIS.
  • Renders the map a section at time.
    This allows even very large datasets to be rendered.
  • Renders each zoom level separately.
    This means that scale-dependant feature visibility is honored.
  • Does not exhibit the rendering issues that QTiles has at tile edges:
    • Does not truncate point icons
    • Labels don’t shift
    • Patterned lines display correctly
  • Fast: 20 minutes to render a complex 60km × 70km topographic map with roads, water, POIs, etc. from levels 5 through 15 on a 3.5GHz i7.
  • Resistant to the QGIS bug that causes raster layers to sometimes not be displayed.
  • Copious progress status display
  • Simple Python script that can be easily modified to suit your needs.

Disadvantages of this program

  • No graphical interface.
  • Cannot be made to stop early without killing QGIS.
  • Rendering complex maps causes the QGIS GUI to temporarily freeze during some parts of the rendering process.
  • Lacks some of the additional options that QTiles offers.
  • Some tiles will be output that are not within the area of interest.
    This happens because large regions are rendered and sliced into tiles. All of a region’s tiles are written to disk without checking whether they are within the area of interest.
Comments are welcome, see the email link at the bottom of the page”

[ Nederland ] – QGIS

May 29, 2018

[ Nederland ] – QGIS

QUICK MAP SERVICES – Open catalog of geodata sources

May 29, 2018

QUICK MAP SERVICES – Open catalog of geodata sources and a way to add them to your GIS in one click

Geoinformation Enabling ToolkIT starterkit

May 21, 2018

Geoinformation Enabling ToolkIT starterkit

Share your maps, measurements, and sensors. Easily.

GET-IT allows you to easily share geospatial data on the web with simple actions.

The suite is the first open-source collaborative effort toward the integration of traditional geographic information with observational data.