Daily Archives: February 21, 2017

QGIS Uncovered


QGIS Georeferencing Historical Maps v. 2.12 Lyon

Harvard CGA

Published on Feb 29, 2016

How to use the Georeferencer in QGIS 2.12 to rubber sheet historical maps. This tutorial demonstrates how to get a rough placement for the historical map using vector layers, and how to pin the historic map features to online basemaps with the Open Layers Plugin.

Demo by Lex Berman, for the QGIS Workshop: http://maps.cga.harvard.edu/qgis/

Introduction to the WorldMap Warper Tool

Harvard CGA

Published on Oct 31, 2014

This is a brief introduction by Kirk Goldsberry to the Warper tool hosted by Harvard University. In addition to downloading the resulting file as a GeoTIFF, it is also possible to bring you map into another system using the WMS link also available on the Export tab. During Rectification (or warping) please not that one can click on “Control Points” below the map and view the points as you are creating them. There are also advanced warping options available by clicking “Advanced Options”.

NYPL Map Warper Tutorial

Debbie Rabina

Published on Mar 13, 2014

Learn how to use the New York Public Library’s Map Warper tool to bring the past into the digital present.
This tutorial will show you how to overlay historical maps onto present day locations by georectfying, or warping maps from the NYPL collection

UNICEF: 1.4 million children face death from famine


UN seeks $1.9 million to address situation

Pruitt – Timeline

Unfit to Lead the EPADonald Trump said that he wants to “get rid” of the EPA, and Scott Pruitt is the man he has chosen to do it.

The Senate is about to vote on Pruitt, click on this Earthjustice petition to call your senator and tell them to vote