In: Products, Resources 25 Jul 2017 Tags: , , , , , , , , , , , , , ,

ATDI announces an innovative method to build digital terrain dedicated to propagation of electromagnetic waves.

How to improve the quality of radio planning:

Actual medium resolution clutter data dedicated to radio planning are based on classification (Dense urban, Suburban, Village, Building blocks, forest, hydro…). With this type of datasets, deterministic propagation models give acceptable results compared to measurements, however, a lot of measurement points cannot be correlated (even with tuning), due to the lack of accurate digital terrain and clutter information (heights and locations of the obstacles, open areas…).

This is why we have developed an innovative method to build more accurate DTM and clutter layers that can be used to create Medium Resolution (10m-20m) and High Resolution datasets (1m-5m).

Different free and commercial sources are combined to create more accurate layers at reduced costs compared to standard datasets.

 

In our example below, on a Medium Resolution dataset (20m)we extracted uncorrelated points from mobile measurement survey, then we performed fixed measurements on these points and built an innovative DTM/Clutter/Building dataset from open data to get better measures/predictions correlation results.

We have used Deygout 1994 / Fine-E propagation model in ICS telecom EV.

Dataset resolution: 20 m.

Test transmitter: 50 W / 138 MHz.

 

Standard Clutter (landcover) model (urban and vegetation contours):

New clutter layer built from Clutter/Building extraction model (Dataset made with ICS telecom EV and ICS map server):

Above, we can see a more realistic urban repartition (in red) than Standard Clutter model.

Building elevations are extracted and medium and high vegetation areas are classified.

Linear (roads, railways, waterways) are added to delineate urban blocks.

Processing time:

< 2 minutes (22 000 km²)

 

Coverage calculation result comparison

Above: Coverage calculation performed on Standard Clutter model

Above: Coverage calculation performed on New Clutter model. We can see a more realistic impact of urban blocks (West), and vegetation (East)

 

Correlation results (originally uncorrelated points only @20 m):

Clutter method Standard deviation Average error Correlation factor
Standard classification 6.78 dB -1.54 dB 0.72
Building extraction 3.81 dB 1.62 dB 0.92
Building extraction + Linear 3.79 dB 1.73 dB 0.92
Buildings transformed to 5 Clutter classes 3.83 dB 1.73 dB 0.92

 

This new method improves significantly the quality of simulations, especially in urban areas. It’s free for Medium resolution datasets and at very affordable price for High Resolution datasets.

We, at ATDI, continue to improve this method. Objectives:

  • Reduce radio planning costs
  • Get always more accurate results
  • Produce data faster

 

Cost:

Resolution Price in Euro
2 m 150 €/km²
5 m 40 €/km²
10 m 5 €/km²
Medium Resolution 0 €/km²

 

ATDI is now building a new China dataset. Will be available soon: www.atdi.com/cartography

 

Thanks to: Japan Aerospace Exploration Agency, National Geomatics Center of China, U.S Geological Survey, Open Street Map, Malta Communications Authority, DianZhen.

In: Products, Resources, Services 02 Jan 2016 Tags: , , , , , , , , ,

New: France 5 m available

ATDI annonce la disponibilité du fichier France 5 m ainsi que quelques zones à 2.5 m.

 

Dataset 5 m :

Résolution : 5 m

Projection : ETRS89

Layers : DTM+Clutter+Buildings

Sources : IGN (Institut Géographique National)

Classes : Buildings (9), Vegetation (8, 5), Hydro (6), Tunnels (16), Routes (11), Voies ferrées (10), Open (0)

DTM modification: Voies ferrées

 

Dataset 2.5 m :

Résolution : 2.5 m

Projection : LAMBERT 93

Layers : DTM+Clutter+Buildings

Sources : IGN (Institut Géographique National)

Classes : Buildings (9), Vegetation (8, 5), Hydro (6), Tunnels (16), Routes (11), Voies ferrées (10), Open (0)

DTM modification: Voies ferrées + Routes

 

Priorités :

1) Voies ferrées

2) Routes

3) Buildings

4) Hydro

5) Végétation

6) Open

 

Vecteurs :

Bâtiments (polygones)

Bâtiments sensibles (polygones)

Voies ferées

Routes

 

Process :

ICS Map Server : DTM – Geocoding

+

ICS telecom (raster ops module)

 

 

Exemple 5 m (département 33) :

Dep33IMG

Dep33MNT

Dep33Clutter

Dep33BLG

ClutterClasses

BLGclasses

 

Exemple 2.5 m (département 75) :

Dep75Clutter2m5

ClutterClasses2m5

MNTmodif2m5

3D

 

 

 

Applications :

Microwave-links

Radio-planning

GSM-R intermodulation

Human Hazard

Surveillance

Communications Electronic Warfare

Download example (5 m)

Prix: nous consulter

 

In: Products, Services 17 Sep 2014 Tags: , , , , , , , , , , ,

Download free Digital Terrain Models and Clutters here

EuropeETRS

Europe 25 m

 

ItalyClutter

Clutter file (25 m)

Clutter25mLarge

 

DTM25mCol

DTM 25 m

DTM25m

 

Digital map dataset link (updated weekly): http://www.atdi.com/cartography/

 



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