World Shaded Relief KMZ file [free download]

This handy color shaded relief map of the world including oceans was created from the NOAA ETOPO1 data set and was intended to be used with handheld Garmin GPS units, but can also make a nice colorful back ground image to use in Google Earth. Find out how to download this free resource …

Download New Brunswick High Resolution Imagery

The Province of New Brunswick recently added a new online web application to their arsenal of online mapping and data tools. The new online web application allows the public to download high resolution digital aerial imagery acquired throughout New Brunswick available at a variety of image resolutions.

Satellite Image Analysis and Terrain Modelling

Satellite Image Analysis and Terrain Modelling is a practical manual for natural resource management, disaster risk and development planning using free geospatial data and software. Find out how to download this manual and the free GIs software used in it …

GRASS GIS 7.4.0 released

GRASS GIS 7.4.0 provides more than 480 stability fixes and improvements compared to the previous stable version 7.2. An overview of the new features in the 7.4 release series is available at New Features in GRASS GIS 7.4.

Nova Scotia Open Data Portal

Recently Nova Scotia joined the growing number of Canadian Provinces and Municipalities that offer open data, when it officially launched the Nova Scotia open data portal providing public access to more than 135 different data sets

Open Data is about drawing on the collective knowledge and innovation of Nova Scotians to help grow our economy and improve the lives of those around us …

Geomatics Yukon GIS Data and Yukon Lands Viewer

Geomatics Yukon GIS Data and Yukon Lands Viewer

Geomatics Yukon GIS Data and Yukon Lands Viewer

Geomatics Yukon is the online portal location where you will find GIS open data and imagery for the Yukon Territory. It hosts and distributes a wide range of web mapping applications and spatial data for several Yukon Government departments and partners that allow people to search their growing collection of available data sets.

Although most data from Geomatics Yukon is freely distributed and available to the public including Imagery; some of the satellite imagery that they have is licensed only to the Yukon Government so is only available to project partners and First Nations governments on request, though the website and requires an Imagery Use Agreement to be completed first.

Geomatics Yukon offers an online web mapping  through the Energy, Mines and Resources Yukon Lands Viewer. It is built upon an Esri server with Geocortex by Latitude Geographics providing powerful well-rounded mapping tools and innovative features for a wide range of experienced and not so experienced end users.

Yukon Lands Viewer showing Satellite Imagery ofDawson City

The Yukon Lands Viewer like many other Esri based web served applications provides many useful tools and applications from searching data sets to customizing your own map. They provide the ability to incorporate your own data from shape files or CSV data as well as the ability to draw and edit features  and then print or export your results. A pretty detailed instruction manual can help those that run into troubles with the map viewer.

Geomatics Yukon aims to provide a central source for distributing Yukon government spatial data and imagery and although some what limited it is off to a good start in becoming an opendata portal.

Yukon GIS Data Web links:

 


 

[originally published Sept 22, 2013]

Grass GIS Software

Grass GIS Software

Grass GIS Software


GRASS GIS
, commonly referred to as Geographic Resources Analysis Support System, is an open source GIS software that is commonly used for geospatial data analysis, data management, image processing, cartography, spatial modeling, and data visualization. It was originally was developed by the US Army Corps of Engineers and is a founding member of the Open Source Geospatial (OSGeo) Foundation.

Grass GIS SoftwareGRASS GIS contains over 350 modules to render maps and images on monitor and paper; manipulate raster, and vector data including vector networks; process multispectral image data; and create, manage, and store spatial data.

It offers both an intuitive graphical user interface as well as command line syntax for ease of operations. It can interface with printers, plotters, digitizers, and databases to develop new data as well as manage existing data.

The latest  stable version available is version 7.  GRASS GIS v7 provides support for large data , has an improved topological vector engine and improved vector network analysis tools. Click here to download it for yourself and give it a try.

 

Bathymetry of Lake Ontario

Bathymetry is used to measure water depths to help model physical underwater terrain found beneath large bodies of water. Similar to the same way that LiDAR models are represent 3D features (or relief) of land terrain, bathymetric maps illustrate the terrain or land that is located under large bodies of water.

Download Bathymetry of Lake Ontario pre-made maps and GIS data …

Download Canadian LandSat Images

Download Canadian LandSat

Download Canadian LandSat Data

Download Canadian LandSat - electromagnetic spectrumThe Landsat program is the longest running series of acquisition imagery based satellites, originally launched in 1972 as the Earth Resources Technology Satellite, it was later renamed to Landsat. Recently a new Landsat satellite was launched (Landsat 8), to help obtain further valuable imagery to be used in geomatics, agriculture, forestry, research, education, and many other industries.

Landsat satellites provide us with images created from reflected and emitted energy in a variety of different wavelengths from the electromagnetic spectrum.

The electromagnetic spectrum (shown in the image to the right) contains includes all radiated energy from gamma rays to radio waves, however the human eye is sensitive and can only view the visible portion of the spectrum (reflected light portion, ranging from violet to red).

Download Canadian LandSat - Landsat 8Unlike earlier versions, Landsats 7 and 8 provide images from the visible spectrum as well as near-infrared, mid-infrared, and thermal-infrared bands

Landsat data for Canadian regions are available for free download. Below you will find links to many Canadian LandSat images.

Download Canadian LandSat 7 Images

How to Get Ontario Topographic Data

Recently, someone contacted me looking for information on where they could find topographic map data for the Thunder Bay area, so I assumed that they must have already checked the Canadian data page, so suggested that they check out the Ontario Basic Mapping web site (OBM).

The Ontario Basic Mapping (OBM) site by the Geography Network is a great online resource with simplistic interactive interface that provides users tools to create customized map views and the ability to download various topographic base mapping data for the entire Province of Ontario. The site contains GIS layers created from 1:10,000 base maps from the Ontario Ministry of Natural Resources that people can download including layers for transportation, water, municipal, elevation, parks and conservation areas.

Today I have included more information about the OBM including a video on how to download free topographic data from the site.