Isatech Corporation has the necessary equipment to capture the cartographic information from stereoscopic pairs (3D restitution), orthophotomosaic (2D capture) and LiDAR information. The cartographic capture process is carried out by highly experienced photo interpreters and experts in the use of the latest GIS tools.
A digital elevation model is a visual and mathematical representation of the height values with respect to the mean sea level, which allows characterizing the shapes of the relief and the elements or objects present in it. These height values may well represent the elevation corresponding to the ground level (DTM) or the elevation of all the elements present on the surface of the study area (DSM) such as vegetation and buildings, among others. Two of the best-known methods to obtain the altimetric infor-mation recorded in the DSMs are photogrammetric restitution from stereoscopic pairs and the processing of information obtained with LiDAR technology. Isatech Corporation has high precision equipment, state-of-the-art software and expert personnel in the capture and processing of information by any of these methods.
Photogrammetry enables three-dimensional models to be obtained from two-dimensional images using stereoscopic vision and mathematical relationships established in projective geometry. In this way it is possible to capture the information in a three dimensional vector format that records the actual height values of the elements present in the images (photogrammetric restitution). Isatech Corporation has the equipment and software necessary for the capture and processing of the images from which the photo-grammetric capture processes are carried out, in addition to this, it has a work team made up of highly qualified photogrammetrists for the implementation of these tasks.
Contour lines are isolines connecting all points on a map that are at the same altitude. With the contour lines we can accurately determine the terrain profile, the unevenness of a path or detect ravines, mountains, steppes and other geographical features represented on the map. They are generally the most common way to represent the elevation of the terrain points and this way give three-dimensionality to what is being represented. Depending on the scale used on it, the vertical distance between contour lines (equidistance) varies, which can be a few meters or several hundred. To obtain the contour lines, it is necessary to have altimetric information, this information can be captured by various methods, among which photogrammetry and LiDAR technology stand out. The photogrammetric method requires 3D capture of each dimension using stereoscopy; thanks to LiDAR it is possible to obtain this information by generating a DTM from the ground points and automatically calculate the contour lines.
The procedure to capture a large area in a single image consists of generating a set of all the orthophographs necessary to cover the area in question. It is convenient that all these photographs are perfectly georeferenced and at the same scale. Then all the images are subjected to color equalization and are joined by drawing seam lines on the overlapping areas present on the photographs so that the joining areas are hidden as much as possible.
LiDAR is an active remote sensing technology that allows the distance between a sensor and an object to be measured by emitting electromagnetic waves. LiDAR calculates the distance between the sensor and the object of study by measuring the time it takes for the emitted wave to return, as well as the direction from which the wave returns. The result of this procedure is a point cloud with X, Y, Z coordinates describing all the elements present on the study surface. The LiDAR information classifica-tion process consists of identifying which levels each of the captured points corresponds to.
LiDAR captures the X, Y, Z geometric information of the elements present in the study area and with in the stored information is also the intensity value with which the infrared wave returns from the object with which it interacts. This information can be represented in different color ranges offering a result similar to that offered by a near infrared image.
We carry out 3D modeling and LIDAR data treatments to obtain topography and digital surface models for modeling cities and structures. We have experience in developing topographic studies with LIDAR in urban areas and in remote areas. The LIDAR data allow the terrain to be modeled identifying the vegetation and infrastructures of the terrain itself. This type of data has applications in urban planning, simulation and disaster planning, forestry, environmental and landscape studies. The possibility of differentiating and modeling terrain, buildings, infrastructures and vegetation separately allows the inclusion of the most appropriate data for each study as well as knowing the effects of each of them on the result.
A spatial database is a database that has been optimized to store and query data that represents the defined objects in a geometric space. Most spatial databases allow the representation of simple geometric objects such as points, lines and polygons. Some spatial databases handle more complex structures, such as three-dimensional objects, topological coverage, linear networks, raster files, and TIN files. Alphanumeric information of all kinds can be associated with each element captured and stored within a spatial database, from which it is possible to carry out all kinds of queries, spatial and statistical analyzes, among many other applications.
A digital elevation model is a visual and mathematical representation of the height values with respect to the mean sea level, which allows characterizing the shapes of the relief and the elements or objects present in it. Continuous DTM is one in which terrain and bathymetric information sources are integrated. This product requires that both sources of information have high altimetric and planimetric precision to result in a digital terrain model that also provides information on the bottom dimensions of water surfaces. Isatech Corporation has aerial remote sensing (LiDAR) and bathymetric (Echosounder) equipment as well as highly qualified personnel to carry out the capture, processing and matching of the information to generate a product of the highest quality.
IMPLEMENTATION AND DEVELOPMENT OF SOFTWARE
Geospatial computing solution oriented towards a web environment for management within a munici-pality.
Urban Licensing Management
Management of certificates
Consultation of Property Information
Information visualization and consultation
Thematic Consultation and Land Registry Consultation
It is a geospatial computer solution oriented towards a web environment that seeks the determination of abrupt changes on the ground as a consequence of anthropic and natural phenomena.
Mass Removal Zones
Modeling of aspects at the Business, Information Systems and Technology level within an organization. Implementing TOGAF ADM methodology.
It is a computer solution designed for analysis and document management oriented toward spatial themes such as the property management of a project. Main features:
Digital document management according to the structure of each organization.
Traceability of documents (Versioning).
Document accessibility management. – Advanced Searches