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Thought Leadership

 

Category: GEO Referencing

Role of Lidar in Preventing and Mitigating Landslides

LiDAR is a commonly used application in high precision sensors in autonomous cars, photogrammetry and bathymetry but it is certainly not limited to it. Do you know that it can also be used in detecting and analyzing the natural disasters like landslides? Landslides lead to huge loss of life as well as property but what if it could be detected and prevented on time.

Lidar- A Tool for Geologists

Geologists now use LiDAR as an effective medium to predict and thoroughly study landslides. Government and scientists have integrated the airborne LiDAR as a major component in disaster mitigation initiatives. Data which is gathered using LiDAR efficiently provides useful insights into geographical risk zones which contributes in the identification of vulnerable areas. One of the main advantage of using this technology is that it provides the images even under thickly vegetated areas along with other hidden details like extent of deformation, slope angle etc. All the above information validates that LiDAR is a valuable tool in landslide assessment.

Cutting Edge Analysis and Preemptive Data

LiDAR helps in getting even minute details and offers an inclusive view, the data is either collected by analyzing the terrain surface or by detecting change between the surfaces on a regular period of time. In prior, the surface features and associated properties are thoroughly analyzed to identify parameter values whereas the later focusses on detecting changes in surface movement and deformation. In both the methods, surface representation is assessed.

Disaster Mitigation

Combining LiDAR with GIS services improves the accuracy and quality of geological data. It enables geologists and disaster management experts to identify landslide prone areas. After marking a site, they start studying the underlying causes of landslide. LiDAR Data Processing reveals subtle surface details that can’t be captured by aerial photographs. The Geo Spatial Data has increased the efficiency of landslide observation a multiple time, which has raised the chances to mitigate landslide.

Significance of GIS Document Management Systems

Today, in the digital world, hard copies need to be converted to digital form before being used for any service. This is because digital maps are easy to maintain. They take up less space and can be preserved for a longer time. Therefore, GIS Document Management System plays a vital role.

Many small and medium business think that the digital solution for document management is for large corporations but small businesses too have begun to implement software document management in their business operation. Since the cost is relatively lesser.

Adopting a system of documentation through GIS-based survey and mapping with spatial details will end false transactions. The UPOR launched as a pilot project in Mysuru in 2010 is expected to be a solution to end fraudulent land transactions.

The digital document management will help maximize the processes related to recovery. Also, management of large files. This means you can search for documents based on certain words or phrases and get the desired results in seconds, while the record of this type might have taken hours before.

Thus, instant retrieval of documents is possible because as you scan and convert, you can apply OCR and documents can be searched based on text content.

For such services, you may get in touch with us. We are a well – known GIS document management company providing services including management, alignment, scanning large maps and indexing of digital data. We also take care of each aspect to preserve the originality of the document.

What is the Importance of GIS Data Conversion?

 

Esri, the global leader in spatial analytics informed about the release of Intelligence Configuration for ArcGIS Pro (ICAP). This will bring the most commonly used ArcGIS data management tools to the forefront in order to better support intelligence analysts.

Document, E-book and pdf conversion among others are the different kinds of data conversion.

GIS Data Conversion –

• It is a critical process in the migration of information from existing information databases to new ones that often require changes in data formats.
• It refers to the alteration and transfer of data between different systems, when the systems undergo replacement or updates.
• It is also of great importance in the insurance sector. Companies can make use of different strategies for converting data to ensure that the data is compatible with their systems.

Right data conversion should ensure the following:-

• Data is converted into an appropriate format and is transferred correctly
• Data works in the new destination database
• Data retains it’s quality and data consistency is maintained at all times across all the systems.

GIS Consortium has the capability to convert hard copy into a wide range of electronic formats. GISC’s team of experienced and multi – skilled specialists have a vast knowledge of converting various types of geospatial data. It can deal with the present day challenges such as complexity of data, project timelines and effect on the quality and accessibility of the data, ensuring a smooth and successful data conversion.

For a good quality GIS Services, you can get in touch with the GIS Consortium.

A Brief Description About GIS Services

The objective of GIS is to identify new trends from the analyzed research. It is a system used to gather data and incorporate it in order to store, scrutinize, distribute and show geographic information.

Studying data using the Geographic Information System will help one learn and understand information much quicker and easier.

GIS data displays actual world features such as elevations, terrain and transportation networks in a digital format. It is often used to study global problems in an effort to find solutions much more quickly.

Different GIS Applications –

• An important use of GIS is for studying the climate change. It can be used in the tracking and analyzing of data regarding the impact of climate change.One can map tectonic shifts in high risk earthquake areas, using GIS mapping for public safety.
• In regards to business marketing techniques, a business can use GIS to analyze demographic data to find regions where they will likely sell their products or services.
• Governments can utilize GIS to analyze census information such as health and education statistics. This is helpful for creating or modifying public policies and government spending.
• GIS technology also provides assistance for mapping and charting in Aeronautic and Maritime fields.
• It can be used for security and law enforcement logistics, urban planning and development and evaluating a potential business market.
• Also, in the management of natural resources by National Geo Resource Management, tracking and analyzing natural disasters with the intent of improving emergency response time.There is use of GIS in agriculture as well.

Applications of GeoReferencing

GeoReferencing is the method of assigning the real-world coordinates to each pixel of the raster. Usually, these coordinates are obtained by doing proper field surveys and collecting coordinates with a GPS device for few easily identifiable features in the image or the map.

It is basically a means to associate something with locations in the physical space or the process of associating a physical map or raster image of a map with spatial locations.

The importance of Georeferencing lies in its ability to turn non-spatial imagery into spatial raster data for use in a variety of circumstances. Spatialized air photos can be used for GIS land cover analysis.

Following Are Some of the Uses of Georeferencing:-

• It makes the different imagery required for mapping. It explains how other data, such as the above GPS points, relate to the imagery.

• Necessary information may be contained in data or images produced at a different point in time. It can be used to compare this data with that currently available.

• Different maps may use different projection systems. The tools of Georeferencing contain methods to combine and overlay these maps with minimum distortion.

• Data obtained from surveying may be given a point of reference from topographic maps by the application of GeoReferencing.

• It may be required to establish the significant relationship between social survey results which have been coded with postal codes or street addresses.

Also, for other geographic areas such as census zones or areas such as public administration or service planning.

How To Process LiDAR Data – 3D Survey

The use of lidar data processing has erupted in recent years, for many good reasons. The Lidar technology helped in producing higher-quality results than traditional photogrammetric techniques that cost low. Therefore, this has created a huge accomplishment to a large extent by the automatically collecting measurements very densely. The progress in laser scanning hardware has been astonishing.

One of the major side effects of switching to lidar-based technology is that it has many challenges in increasing the data volume and the development of software processing abilities required. Fortunately, there are many benefits offered by Lidar technology such as LiDAR Mapping Services, lidar data processing workflow, and Lidar 3D Scans.

Here are Some Tips that enable you to take Advantage of Lidar Data Processing.

1. Have Lidar in LAS Format

Having a lidar in LAS format can be visible to the admitted but not to the one who is new to using lidar data. LAS stand for Laser is the industry standard format for lidar. This helps in choosing the best format that works best.

2. Make Sure the LAS Files Are “Tempered” for Use in GIS

When you have to use LAS, a lot of things go on between initial data collection of LAS files a ready to use the file. Therefore, you can use LAS as there are many flavors out of which some are better than others for use in GIS.

3. Consider Your Options

Look for a company that provides several complimentary options for accessing lidar. Basically, there are three primary data access tools: the LAS dataset, the region dataset, and the mosaic dataset. Therefore, if you will learn about them you will get a better idea to determine which one is for use.

4. Stage Data Appropriately

Lidar data is quite large and requires careful planning to avoid producing a network to its knees or making users wait for long to display.

Therefore, if you have to determine the best overall approach, make sure you get your questions and queries solved. Questions such as – How large is the dataset? And will the whole lidar samples process in order to ad-hoc queries?

Importance of Geo referencing for the Mapping Data

Geo referencing can be understood as the process of conveying real coordinates to the spatial data. It assigns coordinates to the pixels of raster images. Common frames and coordinate systems are developed to define the positions within the information. It helps in determining how the areas in an image correspond to the surface. When you know about the coordinates of points given in the images, you can match these points to those on the charts.

Techniques for Referencing the Data:

The geo referencing of spatial data can be done through two main methods. Firstly, you can use 3D coordinates in which the center of earth serves as the point of origin of all 3 axes. It is a popular method for scientific applications but it is not considered feasible for applying to the points on earth’s surface.

The second method is the projection of the points. In this method, 3D coordinates are expressed as a plane with some height above them. This technique helps in flattening the curved area of a small region into a flat surface for referencing purposes. The plane coordinates point towards a particular point within the projection. It is measured in terms of distances, north and east from the origin.

GEO referencing of spatial data

The Height Measurement:

To understand the uses of geo referencing for mapping data via projection method, it is important to understand the measurement of heights. Typically, the heights are measured from the sea level. However, this method lacks accuracy because sea levels are consistently changing. It increases the complexities and costs of referencing.

There is another metric called Ellipsoid that has approximate values conforming to the sea levels. The local referencing systems differ for every local mapping agency. However, calculating the multinational data can be difficult due to cross-border convergences.

Also, it depends on the quality of devices, type of terrain, incline, shooting altitudes, and many other factors.

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