Operating under the administration of the French Ministry of Defense, the Service Hydrographique et Océanographique de la Marine (SHOM) provides a public service in the fields of hydrography and maritime cartography. Working in partnership with IGN (Institut national de l'information géographique et forestière), SHOM has embarked on an ambitious project to create a seamless, high-resolution elevation model incorporating both bathymetric and topographic coverage for the entire coastline of France as well as French Overseas Territories. Utilizing both airborne LiDAR and multibeam data collection techniques, the Litto3D® project generates enormous quantities of raw data covering the swath of coastline from 10 meters above to 10 meters below sea level and extending at least 2 kilometers inland.
Over the last decade, lidar data has evolved from a luxury commodity to a fairly ubiquitous and readily available resource. While the underlying technology has been around for more than 50 years, only relatively recently has lidar found its way into mainstream GIS.
Traditional mapping practices create a representation of the world from a two-dimensional, top-down perspective. The age-old challenge of projecting spatial data onto a two-dimensional plane is a direct consequence of this apparent necessity. Today's geospatial technology increasingly considers the third dimension in its analysis and data processing tasks, giving us a much more accurate and realistic view. This trend has served to elevate three-dimensional data formats such as LiDAR to the forefront of the geospatial industry.
Concurrent with the expanded availability of LiDAR data, many software companies have developed ever more powerful applications to process the raw point cloud files. These software offerings run the gamut from simple data viewers to complex analysis tools. Sitting squarely between these extremes is Global Mapper, a fully functional desktop GIS application from Blue Marble Geographics.
LiDAR is all the rage and there's a number of tools and resources at the disposal of the technology professional to help him/her work with better and smarter with point clouds and LiDAR data. The following are but of a few of the many resources out there that the user new to LiDAR might wish to consider checking out.
Global Mapper is an ideal tool for generating shape and image files used to make physical 3D terrain models. The shape file directs a CNC milling machine to cut the model. The image is converted to grayscale, dithered and laser marked on the model surface. Laser marking is an optical and CNC process and is very accurate.
Much as is the trend with many other sensing technologies, the volume of data coming off light detection and ranging (LiDAR) sensors available for analysis, visualization and dissemination is growing by leaps and bounds. Although LiDAR sensors have always generated plenty of information, the growth in demand for LiDAR data, along with advances in sensors and collection technologies, has created masses of data that just keep on growing.
The use of light detection and ranging (LiDAR) data has taken center stage in geospatial technology during the last few years. LiDAR data collection hardware vendors and service providers, who historically supplied imagery or survey services, have teamed to offer numerous options for collecting and delivering highly precise data.
Part 1 of a 2 part series highlights the inherent deficiency of the State Plane Coordinate System with regard to excessive scale factors, the poor solutions often employed by surveyors and engineers to remedy that deficiency, and suggests a viable alternative through the use of Low Distortion Projections - LDP.
MicroSurvey Software Inc. has rolled out a new version of its desktop survey and design software, MicroSurvey CAD 2014, adding new functionality for geospatial data and featuring Blue Marble Geographic's Global Mapper v15 software supporting more than a hundred elevation, imagery and vector formats.
Faced with an expectation of five feet of sea-level rise by 2100, Portland, ME has a number of questions to answer: What should they do? Is a seawall the right answer? How big should it be, and where? What about building a new school, or moving a sewage-treatment plant? The dollar amounts for these things are always in the millions, if not the billions. Nobody wants to spend that much money and find out years from now it was too much - or too little, or the right amount but in the wrong place.
"I didn't know it existed"; "I couldn't get access to it"; and "It's not compatible with my system" are barriers that are falling away as implementations of the OGC's web catalogue, map, feature and coverage service standards become widely used.
In an article from the October 2012 issue of Professional Surveyor Magazine, David McKittrick, of Blue Marble Geographics, discusses the basics of GIS and how GIS technology can complement the tools in use by the surveying community.
Snowmelt, rain, ice and tides routinely deliver unpleasant surprises to Mainers in the form of flooding. Factor in the sea-level rise scientists predict from global warming and it can be hard to anticipate where and when coastal flooding might occur. But a collaboration between researchers and a Maine software firm could help municipalities plan for future flooding, in a way that minimizes the associated costs.
The Earth is a dynamic body... Because of these movements, a position that was observed at one epoch or point in time may have a significantly different location within a reference frame at another epoch. Time-dependent positioning therefore becomes important for anyone who wants to use GPS to its submeter precision potential.