Category: GIS
Digital Elevation Models (DEMS)
A digital elevation model (DEM) or sometimes referred to as a digital terrain model (DTM) is a quantitative representation of the topography of the Earth. DEMs are used as a source of elevation (and to create other digital terrain models) for many different purposes
Digital Terrain Modeling
Digital Terrain Modeling is the process of simulating or representing the relief and patterns of a surface with numerical and digital methods. It has always been an integral component to geology related fields such as geomorphology, hydrology, tectonics and oceanography but over the past decade has also become a major component to non geophysical applications such as GIS modeling, surveying and land use planning.
Terrain Models are derived from data represented by digital elevation models (DEMs) and can include shaded relief models, slope and aspect models, perspective scene generation, and drainage basin analysis (and other models).
CanadianGIS
CanadianGIS.com is an extension of my web site that I started back in 2006 after I noticed that there was a real need to have one good place on the web to help find Canadian GIS resources. The site helps provide others with resources about Canadian GIS data, basic information about Canadian companies that provide GIS services, locations of Canadian data and maps, information about GIS events, places to find Canadian GIS employment and education info and many other great resources.
GIS Mobile Mapping
When you combine global positioning systems (GPS) and geographic information system (GIS) technology together you get a powerful tool better known to most in the Geomatics industry as Mobile Mapping. This combined technology allows users to visualize information with existing digital data, record new information exactly directly at the source, and interact directly with the world around you.
Included here is a report written for an ArcPad / Trimble mobile mapping project, a presentation that covered all aspects of the project and more general information and links about GIS mobile mapping. The report includes all code used in designing the ArcPad application (visual basic, XML etc). The presentation was presented at COGS in Lawerncetown, Nova Scotia during the fall of 2003. The existing AGRG weather station network now consists of 14 tripods and 1 tower setups (as of Aug 2004).
Geomatics – GIS Spatial Modeling
GIS Spatial Modeling is the process of modeling, examining, and interpreting geographic data.It uses a set of defined methodology and analytical procedures to derive information with spatial relationships between geographic phenomena. It can be useful for evaluating suitability and capability, for estimating and predicting, and for interpreting and understanding real world situations. There are four traditional types: spatial overlay surface analysis, linear analysis, and raster analysis.
Here, ESRI Geostatistical Analyst was used to create a model that can be easily used to depict the amount of precipitation that a community in the region would experience based on the data from the databases.
Geomatics – GIS data base modeling
The design of the spatial database is the formal process of analyzing facts about the real world into a structured model. Database design is characterized by the following phases: requirement analysis, logical design and physical design. In more common terms, you basically need a plan, a design layout and then the data to complete the process.
Geographic Information Systems (GIS)
GIS operates on many levels and over the past decade has become an essential tool for most urban and resource planning and management organizations. On the most basic level, GIS can be used for simple digital cartography, to create various types of maps.
Geomatics – Cartography
Cartography or Map Design is the practice of creating maps or visual representations of a surface, as you would see it from above it. Traditionally maps have always been created using pen and paper, but since the introduction and wide spread use of geographic information systems (GIS) and computers, cartography practices have evolved more into the digital world. Most maps today are now generated using map software that falls into one of three main types; GIS, CAD, and specialized map graphic design software.
