Aerial survey for engineering and mapping, cadastral and topographic surveys. Topographic 1: 500 plans production.

Cost of services

1. Topographic plans production
Aerostream provides services for topographic plans production. We cover scales from 1: 500 to 1: 5000. Our experience is over 10 years. Our highly qualified aerial surveyors and cartographers perform the service in the shortest possible time allowing you to save time and reduce costs.

For the Leningrad Region, the cost of creating a topographic plan at a scale of 1: 500 starts from 5000 rubles per hectare, at a scale of 1: 1000 from 2300 rubles per hectare , at a scale of 1: 2000 from 2000 rubles per hectare

2. Classical aerial survey and production of orthophotos and other deliverables
Aerostream provides aerial survey services using professional UAVs equipped with a dual-frequency satellite receiver and a professional full-frame 24-42 megapixel camera. We are more than 7 years in business and have an established team of qualified aerial surveyors. We offer a full cycle of work from the ground based topographic preparation for the survey to data processing and delivering final products - topographic plan and/or orthophoto.
The cost of 1: 500 orthophotos for linear objects is from 1,500 rubles per kilometer, depending on the size of survey.
The cost of 1: 500 orthophotos for areal objects is from 3000 rubles per square kilometer, depending on the size of survey.

The work includes:

  • Obtaining permits for airspace use 
  • Installation of ground control points (GCPs)
  • Aerial survey (image capturing and GNSS observations)
  • Processing of GNSS measurements, image center coordinates calculation, verification of results with control points
  • Photogrammetric processing - production of orthophoto, digital surface model, digital terrain model (under certain conditions), 3D terrain model, point cloud
  • importing data into AutoCAD

Final results are provided in AutoCAD 

3. Earth work assessment and volume measurements

10,000 rubles per hectare

4. Site boundaries mark out

starting at 10,000 rubles 

 

The workflow

UAV aerial survey

To maximize economic effect of the surveying we use high-performance drones with the best possible characteristics of the camera and an on-board satellite (GNSS) receiver. At Aerostream we use professional industrial drones - Geoscan 101, Geoscan 201, Geoscan 401. For small objects we use Phantom 4 Pro v2 customized for PPK surveying by UAV-design. The accuracy of the final product is up to 10 cm horizontally and vertically. The RMS of the detailed survey is 1-2 cm.

Fixed wing drones start from a catapult, copters take off from any level ground. The video below shows UAVs taking of and the use of obtained materials for cadastral monitoring and volume control.

GNSS observations processing

After the flight, pictures and a logs from GNSS receiver are downloaded. We than calculate the exact coordinates of the image centers.

All our drones are equipped with dual-frequency or single-frequency survey grade satellite receivers. During the flight, the on-board GNSS receiver logs the coordinates and camera shutter events. Data capturing rate is 10 Hz. Precise synchronization between the camera and the GNSS receiver allows to get timestamps at the exact moments of shutter release. GNSS data processed along with the data from the ground base station and the data of the reference stations (if available). After post-processing the accuracy of the image center coordinates is usually a few centimeters horizontally and vertically.

Photogrammetric processing

Performed in Agisoft Metashape Pro. On our orthophotos you will never see "crooked" roofs or leaning buildings and structures. You will get the data in orthographic projection.

Coordinates of the image centers are used as input data. Ground points are used for control.

The results of photogrammetric processing

Orthomosaic in geotiff, jpg, Google Earth KML formats. Single file or divided to tiles.
Digital Surface Model as a height map in TIFF/BIL/XYZ formats. Individual buildings and vegetation could be excluded if necessary

Photogrammetric  point cloud in TXT (XYZ point cloud), LAS, DXF formats. A point cloud of any density could be generated.
Contour lines  at a given step based on a dense point cloud. In any GIS format of in DXF.
Scales available: 1:500, 1:1000, 1:2000

Production of topographic plan from aerial survey materials

  • import of orthophoto into AutoCad
  • obtaining of elevation values from a height map, importing values to AutoCAD
  • mapping and vectorization of the orthophotos
  • field verification, survey of objects that are not visible on aerial images
  • final topographic plan production

Orthophoto mosaic is imported into AutoCAD, where vectorization is performed along with object classification. The contours of lands, fences, engineering structures, buildings and other visible elements of the topographic plan are plotted.

Дешифирование материалов съемки производится также с использованием высококачественного плотного облака точек непосредственно в AutoCad. Пример облака ниже:

After the field inspection and surveying of the elements that are not visible from the air, a cartographer creates a "clean" product according to the requirements for topographic plans.

CONCLUSIONS

– AERIAL SURVEY, REDUSES THE FIELD WORK TIME BY 70%-90% DEPENDING ON THE COMPLEXITY OF THE SURVEY SITE, WHICH MAKES OVERAL PROJECT COST MUCH LOWER.
– DATA PROCESSING SIDE OF WORK DOESN'T CHANGE MUCH, WHILE THE QUALITY OF THE FINAL PRODUCT IS BETTER.
– THE ACCURACY OF THE OBTAINED MATERIALS IS AS GOOD AS THE ONE DELIVERED BY CLASSICAL METHOD OF TOPOGRAPHIC OR CADASTRAL SURVEYS, AND SOMETIMES (WHEN OBTAINING THE RELIEF) IS EVEN BETTER.

Order

en_USEnglish