GIS For Biologists: Tip #6 – How To Transform A Data Layer Into A Different Projection/Coordinate System

GIS In Ecology

Most of the common problems that people encounter when using GIS for biological purposes are caused by one, or more, data layers not being in the same projection/coordinate system (also known as the coordinate reference system of CRS, depending on the GIS software that you are using) as either the GIS project itself, or other data layers in the GIS project. This means that once you have set your projection/coordinate system for your GIS project (see video tip #4) and added data layers to your GIS project (see video tip #5), you may need to transform one or more of them into a different projection/coordinate system, and more specifically into the same projection/coordinate system as your GIS project, before you can do anything with it.

Transforming a data layer from projection/coordinate system to another is easy to do, and can done in a similar way in most GIS software…

Lihat pos aslinya 59 kata lagi

Iklan

New paper: Footprints in the sky – using student track logs in Google Earth to enhance learning

now we know how important is to track your student …

Po Ve Sham - Muki Haklay's personal blog

screen shot for paperIn 2011-2012, together with Richard Treves, I was awarded a Google Faculty Research Award, and we were lucky to work with Paolo Battino for about a year, exploring how to use Google Earth tours for educational aims. The details of the projects and some reports from the project are available on Richard’s blog, who was leading on many aspects of the work. Now, over 2 years since the end of the project, we have a publication in the Journal of Geography in Higher Education. The paper, titled ‘Footprints in the sky: using student track logs from a “bird’s eye view” virtual field trip to enhance learning’, is now out and describes the methodology that we developed for tracking students’ actions.

The abstract of the paper is:

Research into virtual field trips (VFTs) started in the 1990s but, only recently, the maturing technology of devices and networks has…

Lihat pos aslinya 95 kata lagi

GIS For Biologists: Tip #5 – Adding An Existing Data Layer To A GIS Project

add vector layer on your QGIS …
nice video tutorial from Dr. Colin D MacLeod

GIS In Ecology

Once you have set the projection/coordinate system of your GIS project, you can think about adding data layers to it. Almost all GIS software packages allow you to add data layers in a similar way, but for this video, QGIS is used to show how to add an existing data layer to your GIS project. As part of this video, you will learn not just how to load the data layer into your GIS project, but how to check what projection/coordinate system it is based on, and how to change the way that it is displayed. These are the standard procedures which you should follow whenever you add an existing data layer to a GIS project, regardless of the GIS software which you are using.

If you have any questions or queries about this video, feel free to comment on this post and I’ll do my best to answer…

Lihat pos aslinya 12 kata lagi

Landsat 8 – live

buat yang hobi download gambar dari Landsat (EarthExplorer USGS), sekarang MapBox punya Landsat Live !!! cool ..

Behind the Map

The release of Landsat 8 has provided a great source of free medium-resolution multi-spectral imagery that is collected multiple times per year. To access the imagery, I would download the large files from an application such as USGS’s Earth Explorer. Now Mapbox has released landsat live, a website that provides the latest landsat imagery that is typically about 2 weeks old. While the resolution isn’t great, it is does give a more up-to-date view than what is provided by Google, Yahoo, Bing or other online maps satelite imagery. NOTE: an improvement could be made to the landsat live resolution by overlaying the 30 m imagery (bands 4,3 and 2, made slightly transparent) over the 15 m resolution panchromatic band #8.

Below are some pictures from landsat live that show what a hard winter we’ve had in New Brunswick. In Fredericton you can barely see any of the roads or…

Lihat pos aslinya 35 kata lagi

GIS Lecturer, in Bahasa (Indonesian)