As the applications for drones have become much more widely wide spread, among the most enjoyable uses of the concept is aerial surveying. Additionally described as’ Drone Mapping’; to put it simply, this practice entails acquiring a huge selection of aerial pictures and then’ stitching’ them together electronically with specialised mapping applications to create a bigger more exact composite image. In this article, we will be discussing what drone mapping is utilized for, and how the business of yours might have the ability to make use of it.
Just before we plunge into what drone mapping is utilized for, we need to first ensure we’ve a foundational comprehension of the process itself, that is named photogrammetry. Based on photogrammetry dot com, “photogrammetry is the science of creating measurements from photographs”. The input to photogrammetry is [aerial] pictures, as well as the ensuing output is usually a map, a rendering, a measurement, or maybe a 3D model of several real world object or perhaps arena, and it is often-used in areas like topographic mapping (see www.propelleraero.com/use-cases/drone-topography), architecture, engineering, manufacturing, quality control, along with police investigation, simply to name just a few.
To be able to make a digital representation of truth, data collection of the topic have got to primarily occur. Generally this’s achieved with a drone or maybe sUAV, flying a fixed grid like flight program with the subject property recording a huge selection of nadir (straight down) and oblique (30-45-degree angle) photographs.
For the sweet and short answer to “What is Photogrammetry?”, we answered it in under hundred words.
When acquired, these pictures have being examined and prepared for commonalities to be able to produce what’s known as a’ Point Cloud’. There are many photogrammetry software programs offered, with 2 of the market leaders being DroneDeploy and our favorite, Pix4D. It’s this particular software program which might produce a digital representation of reality by stitching in concert the huge selection of images taken during a mapping mission flight.
TYPES OF MAPS
You will have to find out what map type you will be creating during post processing, because it is going to determine the kind of flight necessary for that preferred output. But without getting in to the nitty gritty, right here we will clarify some of the most requested outputs available as well as the health benefits they offer.
An orthomosaic map (or maybe ortho map) is a composite image looking straight down, typically developed for big areas of home. These maps could be utilized for taking accurate distance and also surface area measurements as the distortion in the tips of the pictures as a result of the curvature of the planet were accounted for and rectified in the program. This causes a flawlessly straight down view over all of areas of the picture with no change in perspective based on perspective.
DTM and DSM (Digital Surface Model as well as Digital Terrain Model)
A Digital Surface Model is a digital representation of the planet’s surface area in just a set of predefined coordinates, plus most objects elevated above the soil as buildings and trees. Unlike the DSM, a Digital Terrain Model (or maybe DTM) doesn’t include some items or buildings and just belongs to the surface area of the planet. Both utilize RGB information to represent differences in elevation, as illustrated in the next picture.
Contour Line Maps
Usually just described as’ Contours’ or’ Topographic Maps’ are two dimensional maps, where lines on the map join points of identical elevation. These lines reveal valleys and peaks also the steepness of the incline.
Contour lines usually are available in 3 varieties on any chart, plus they Index Lines, Intermediate Lines, along with Supplementary Lines. Index lines would be the thickest lines on the map and are usually marked with a number saying the elevation above MSL (Mean Sea Level). Intermediate Lines are finer and also present in an interval of 5 for each single Index Line, representing a variation in elevation loss or even gain. Supplementary Lines appear as dotted simply depict flatter more level terrain.
We just touched on some of the most requested kinds of maps, but you’ll find other types which could be produced like 3D maps, Index, or Reflectance, along with Thermal maps to name a couple of others. These 3 are usually employed in what’s described as precision agriculture.
And so What’s DRONE MAPPING USED FOR?
Nearly something that you can stand having a much better look at or maybe view of. Drone surveying and mapping practically provide you with the capability to “see the fundamental picture” – but probably the most crucial single thing a drone is utilized for is usually to’ save time’. Whether surveying a department of undeveloped land for future development, creating an ortho map of a 100 acre ranch to better handle cattle grazing, building 3D models for real estate advertising, or maybe infrastructure assessment and also management – the uses are much and wide-reaching so we are able to get details in a portion of the period.
A map is invaluable, however when you are able to merge real world map data with industry standard application as CAD, the choices are unlimited. Builders are monitoring construction site progress in near real time, and competent to undertake on-the-spot’ as-built’ vs.’ as-designed’ assessments.
In case you are uncertain just how you may apply this technology in your current operation but wish to read more, then meet us and we would be glad to reply to some inquiries you might have.