WO2013088061A1 - Procede de generation d'une cartographie d'une zone geographique. - Google Patents
Procede de generation d'une cartographie d'une zone geographique. Download PDFInfo
- Publication number
- WO2013088061A1 WO2013088061A1 PCT/FR2012/052885 FR2012052885W WO2013088061A1 WO 2013088061 A1 WO2013088061 A1 WO 2013088061A1 FR 2012052885 W FR2012052885 W FR 2012052885W WO 2013088061 A1 WO2013088061 A1 WO 2013088061A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- obstacle
- generating
- obstacles
- height
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/05—Geographic models
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10032—Satellite or aerial image; Remote sensing
- G06T2207/10036—Multispectral image; Hyperspectral image
Definitions
- the present invention is in the field of telecommunications networks.
- It aims more particularly at a method of generating the cartography of a geographical area, this mapping being able to be used to model the propagation of electromagnetic waves in a real environment in a very wide geographic area, for example at the scale of a country. .
- the invention relates to a method of generating a map that does not have the disadvantages of those of the state of the art.
- the invention relates to a method for generating a map of a geographical area, this method comprising:
- a step of generating the mapping by associating, at each of the geographical positions, the morphology of the obstacle with the height of the obstacle.
- the invention relates to a calculator capable of generating a cartography of a geographical area, this calculator comprising;
- the invention thus proposes to generate a cartography using morphology information obtained by analysis of a multi-spectral satellite image, merged with data on the height of the obstacles, obtained for example by radars or lasers embedded in aircraft.
- the method of the invention makes it possible to obtain a good accuracy mapping with an extremely simplified calculation effort compared to those based on a three-dimensional modeling of the buildings.
- It can also be used to map a very large geographical area.
- the generation method according to the invention comprises a step of correcting the morphology of an obstacle from the height of the obstacle.
- the method of generating a map according to the invention comprises;
- a step of obtaining third vector data representative of the geographical position of certain obstacles a step of correcting the mapping by correcting at least the morphologies and / or the first data and / or the second data from these third data at the position concerned.
- the correction consists in assigning, to an obstacle whose morphology is incompatible with its height, a dominant morphology compatible with its height among the obstacles surrounding this obstacle.
- the invention relates to a method for simulating the propagation of an electromagnetic wave in a geographical area. This process comprises;
- the invention also aims to use a mapping of a geographical area obtained according to a generation method as mentioned above for modeling the traffic in a telecommunications network.
- the various steps of the generation method are determined by instructions of computer programs.
- the invention also relates to a computer program on an information medium, this program being capable of being implemented by a computer, this program comprising instructions adapted to the implementation of the steps of the method of generation as mentioned above.
- This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code, such as in a partially compiled form, or in any other form desirable shape.
- the invention also relates to a computer-readable information medium, comprising instructions of a computer program as mentioned above.
- the information carrier may be any entity or device capable of storing the program.
- the medium may comprise storage means, such as a ROM, for example a CD ROM or a microelectronic circuit ROM, or a magnetic recording medium, for example a floppy disk or a disk. hard.
- the information medium may be a transmissible medium such as an electrical or optical signal, which may be conveyed via an electrical or optical cable, by radio or by other means.
- the program according to the invention can be downloaded in particular on an Internet type network.
- the information carrier may be an integrated circuit in which the program is incorporated, the circuit being adapted to execute or to be used in the execution of the method in question.
- FIG. 1A represents a satellite image of a geographical area
- FIGS. 1B and 1C give examples of data used in the invention for the area of FIG. 1A;
- FIG. 2 represents, in flowchart form, the main steps of a method of generating a map according to a particular embodiment of the invention
- Figure 3 schematically shows a data structure that defines, which height classes can be assigned to a given morphology
- FIG. 4 represents a computer according to a particular embodiment of the invention. Detailed description of the invention
- Figure 1A shows a multi-spectral satellite image of a geographical area. Such an image makes it possible in particular to distinguish between a body of water and a flat terrain; it also makes it possible to recognize a homogeneous forest.
- FIG. 1B shows vector data Vxy of certain obstacles of FIG. 1A at positions Pxy.
- FIG. 1C represents, for a building of FIGS. 1A and 1B: the first altitude DSMxyz data of the obstacles at positions Pxy, with respect to the level of the sea;
- FIG. 2 represents, in flowchart form, the main steps of a method of generating a map according to a particular embodiment of the invention.
- morphologies include grass, forests, roads, urban areas, city centers, shopping malls, buildings, and the sea.
- a “free” morphology is also defined to represent geographical areas free from any morphology on the ground. For example, the area around the city of Las Vegas that has no forest or vegetation would be described as “free”. This morphology is also found in cities when there are open areas that are not transportation corridors, such as parking areas.
- the aforementioned morphology obstacles located at the Pxyz positions are assigned DSMxyz data obtained by radar representative of the height of the summits of these obstacles relative to the level of the sea.
- the same obstacles are assigned DTMxyz data also obtained by radar representative of the height of the ground at this position Pxyz with respect to the sea level.
- the method of measuring the elevation can be carried out by radars or even lasers. These measurements can in particular be made from airplanes, radars embedded on satellites not offering sufficient resolution.
- a capture of the elevation carried out by the "IFSAR" technique ("Inferometric synthetic aperture radar”) of the company Intermap; the radars are embedded in planes.
- the resolution (distance between pixels) of the information is typically 10m or better.
- the height Hxy of the obstacles is calculated by difference DSMxyz-DTMxyz.
- the invention makes it possible to make a first mapping, associating at each position Pxyz, a morphology Mxy and a height class. For example: tall forest [15-20m].
- the invention thus proposes to correlate the morphology extracted from the multi-spectral satellite image and the difference between the DSM data and the DTM data.
- the vector data Vxy of certain obstacles are obtained at the positions Pxyz.
- the vector data is obtained for the roads.
- the generation method according to the invention comprises a step of correcting the morphology of an obstacle from the height of this obstacle, without taking into account the vector data.
- an obstacle of morphology "grass” of more than 5 meters, can be requalified in morphology "Forest”.
- the corrections can also take into account the morphology of the obstacles surrounding the obstacle considered. More specifically, the method according to the invention may comprise a correction step of assigning, to an obstacle whose morphology is incompatible with its height, a dominant morphology compatible with its height among the obstacles surrounding this obstacle.
- This principle of substitution of a morphology makes it possible to correct errors in the morphology initially derived from statistical sources whose reliability is not as good as that of the elevation datum.
- the morphology of an obstacle can be requalified from the height class of this obstacle and the vector data of this obstacle, without taking into account the morphology of the surrounding obstacles: for example, a piece of information
- a vector identifying an area as a highway (Route morphology) will be used in conjunction with the height of the obstacle to model an elevated road.
- Route 5-10m for a raised highway of 5 to 10m. This approach allows for very accurate modeling of bridges and elevated highways.
- the height class of an obstacle is not modified from its morphology.
- FIG. 4 represents an exemplary calculator 10 according to the invention.
- This calculator comprises a processor 11, a RAM type 12 memory chip and a ROM type ROM 13 comprising a computer program PG capable of implementing the method represented in the form of a flowchart in FIG. a database for storing the data M y, DSMxyz, DTMxyz, Hxy and C previously described.
- the processor 11, your memories 12 and 13 and the program PG constitute in particular:
- mapping obtained by the generation method of Figure 2 is used to simulate the propagation of an electromagnetic wave in the geographical area.
- This mapping associates, as already detailed above, for each obstacle of the zone, a morphology at a height or class of height.
- the user uses altitude altitude DTM data relative to the sea level at different geographic points of said zone, which can be obtained by radar.
- Mapping can also be used to model traffic in a telecommunications network in the geographical area.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Geometry (AREA)
- Software Systems (AREA)
- Remote Sensing (AREA)
- Computer Graphics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Processing Or Creating Images (AREA)
- Image Processing (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/364,956 US20140368501A1 (en) | 2011-12-12 | 2012-12-12 | Method for generating a cartography of a geographic area |
CA2858936A CA2858936A1 (fr) | 2011-12-12 | 2012-12-12 | Procede de generation d'une cartographie d'une zone geographique |
GB1410432.7A GB2516553B (en) | 2011-12-12 | 2012-12-12 | Method for generating a cartography of a geographic area |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1161467 | 2011-12-12 | ||
FR1161467A FR2983997B1 (fr) | 2011-12-12 | 2011-12-12 | Procede de generation d'une cartographie d'une zone geographique |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013088061A1 true WO2013088061A1 (fr) | 2013-06-20 |
Family
ID=47599058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/052885 WO2013088061A1 (fr) | 2011-12-12 | 2012-12-12 | Procede de generation d'une cartographie d'une zone geographique. |
Country Status (5)
Country | Link |
---|---|
US (1) | US20140368501A1 (fr) |
CA (1) | CA2858936A1 (fr) |
FR (1) | FR2983997B1 (fr) |
GB (1) | GB2516553B (fr) |
WO (1) | WO2013088061A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2540587B (en) * | 2015-07-22 | 2021-04-14 | Bae Systems Plc | Evaluating near range communications quality |
US10291339B2 (en) | 2015-07-22 | 2019-05-14 | Bae Systems Plc | Evaluating near range communications quality |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008034465A1 (fr) * | 2006-09-19 | 2008-03-27 | Telecom Italia S.P.A. | Procédé de dérivation de modèles de terrain numériques à partir de modèles de surface numériques |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6654690B2 (en) * | 2001-04-05 | 2003-11-25 | Harris Corporation | Automated method for making a topographical model and related system |
US20100182316A1 (en) * | 2009-01-22 | 2010-07-22 | Harris Corporation | Geospatial modeling system for 3d clutter data and related methods |
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2011
- 2011-12-12 FR FR1161467A patent/FR2983997B1/fr active Active
-
2012
- 2012-12-12 US US14/364,956 patent/US20140368501A1/en not_active Abandoned
- 2012-12-12 WO PCT/FR2012/052885 patent/WO2013088061A1/fr active Application Filing
- 2012-12-12 GB GB1410432.7A patent/GB2516553B/en active Active
- 2012-12-12 CA CA2858936A patent/CA2858936A1/fr not_active Abandoned
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008034465A1 (fr) * | 2006-09-19 | 2008-03-27 | Telecom Italia S.P.A. | Procédé de dérivation de modèles de terrain numériques à partir de modèles de surface numériques |
Non-Patent Citations (2)
Title |
---|
ANSGAR BRUNN ET AL: "Extracting buildings from digital surface models", JOINT ISPRS COMMISSION III/IV WORKSHOP. 3D RECONSTRUCTION AND MODELLING OF TOPOGRAPHIC OBJECTS, 17 September 1997 (1997-09-17), XP055039874, Retrieved from the Internet <URL:http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.7.5099&rep=rep1&type=pdf> [retrieved on 20121002] * |
MARKUS NIEDERÖST: "RELIABLE RECONSTRUCTION OF BUILDINGS FOR DIGITAL MAP REVISION", INTERNATIONAL ARCHIVES OF PHOTOGRAMMETRY AND REMOTE SENSING. VOL. XXXIII, PART B3. AMSTERDAM 2000., 1 January 2000 (2000-01-01), XP055039889, Retrieved from the Internet <URL:http://www.isprs.org/proceedings/XXXIII/congress/part3/635_XXXIII-part3.pdf> [retrieved on 20121002] * |
Also Published As
Publication number | Publication date |
---|---|
GB201410432D0 (en) | 2014-07-23 |
CA2858936A1 (fr) | 2013-06-20 |
FR2983997A1 (fr) | 2013-06-14 |
GB2516553B (en) | 2016-01-27 |
GB2516553A (en) | 2015-01-28 |
FR2983997B1 (fr) | 2014-01-03 |
US20140368501A1 (en) | 2014-12-18 |
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