Height reference for parcels and land object for the 3D cadastres structuring

Transcription

1 Program on on Latin America and and the the Caribbean 4th International FIG 3D Cadastre Workshop 9-11 November Dubai, United Arab Emirates Height reference for parcels and land object for the 3D cadastres structuring Diego Alfonso ERBA, Gustavo NOGUERA, Aldo MANGIATERRA; Argentina Geovanna Alexandra Chávez Cangás, Ecuador 1

2 Initial considerations New definitions, new frustrations. Same obsession in 3D than in 2D same mistakes. Different 3D cadastres for different users. Can a 3D cadastre implementation reduce land property concentration, improve the use of natural resources and reduce informality along L.A.? 2

3 Orthodox cadastre in L.A. Economic Tax Legal Physical 3

4 Orthodox cadastre in L.A. Economic Tax Legal Physical 4

5 Orthodox cadastre in L.A. Georeferencing 5

6 Orthodox cadastre in L.A. Georeferencing 6

7 Orthodox cadastre in L.A. Georeferencing Hayo Hase 7

8 Orthodox cadastre in L.A. Georeferencing 8

9 Orthodox cadastre in L.A. Georeferencing the land market Mario Piumetto & Diego Erba 9

10 Alternative cadastre for L.A. Guanajuato, México Diego Alfonso Erba 10

11 Alternative cadastre for L.A. Carlos Paz, Córdoba, Argentina Diego Alfonso Erba 11 11

12 Alternative cadastre for L.A. 12

13 Alternative cadastre for L.A. 13

14 Alternative cadastre for L.A. 14

15 Alternative cadastre for L.A

16 Alternative cadastre for L.A. Osasco, SP, Brasil Viviane Manzione Rubio 16

17 Height reference for parcels and land object Case study 17

18 Height reference for parcels and land object Case study 18

19 3 km 19

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21 21

22 22

23 Model of geoid of city Rosario, Argentina, MGR06 Source: Balbarani et al. (2006) 23

24 Model of geoid of city Rosario, Argentina, MGR06 Source: Balbarani et al. (2006) 24

25 EGM2008 calibrated with the permanent station UNRO 25

26 EGM2008 calibrated with the permanent station UNRO 26

27 Complex of buildings Ciudad Ribera, Rosario, Argentina 27

28 Complex of buildings Ciudad Ribera, Rosario, Argentina 28

29 Complex of buildings Ciudad Ribera, Rosario, Argentina l = 18.55m (street level) private property public property 4,16m (13.65 ft), local system l = 2.00m (water level at 09/31/2009) 29

30 Complex of buildings Ciudad Ribera, Rosario, Argentina l = 22.14m (street level) private property public property 7,75m (25.43 ft), national system (elev. above sea level) 30

31 Complex of buildings Ciudad Ribera, Rosario, Argentina l = 39.10m (street level) private property public property 24,71 m (81.07 ft), global system (ellipsoidal elevation/local geoid) 31

32 Building Embarcadero, Rosario, Argentina 32

33 Building Embarcadero, Rosario, Argentina 33

34 Building Embarcadero, Rosario, Argentina private property l = 7.50m Easement (public space) l = 0.00m (local system) private property 34

35 Building Embarcadero, Rosario, Argentina private property l = 30.57m Easement (public space) l = 23.07m (global system) private property 35

36 Building Embarcadero, Rosario, Argentina private property l = 47.53m Easement (public space) l = 40.03m (global system) private property 36

37 37

38 2.50m Building Sr. Washington Calahorrano, Quito, Ecuador l = 12.78m l = 10.26m 2.32m 2.32m 2.32m l = 7.74m l = 5.22m l = 2.70m l = 0.00m 38

39 2.50m Building Sr. Washington Calahorrano, Quito, Ecuador l = 2777,46m 2.32m 2.32m 2.32m l = 2,767.20m (9078 ft) 39

40 2.50m Building Sr. Washington Calahorrano, Quito, Ecuador l = 2804,96m 2.32m 2.32m 2.32m l = 2,794.70m (9167 ft) 40

41 Final considerations A 3D cadastre is a register that contains the spatial position of objects and land parcels in the space, defined with adequate precision and at a particular time. It is not possible to set a single precision for the references of heights, it varies with the character of cadastral objects. Ellipsoidal height solves the essential need to register 3D parcels, but it is not enough. In many cases the orthometric height must be used, together with the ellipsoidal height. 41

42 Final considerations this work we are only referring to the spatial positioning tolerances, considering the cadastral object as a block, excluding from the analysis accuracies required in internal measures of territorial object. Each institution responsible for a 3D cadastre has their own tolerances. the tectonic movements are not a problem since, as its effects are known, it is perfectly possible to correlate the coordinates of an object in space, in two different periods. 42

43 Thanks! Diego Alfonso ERBA, Gustavo NOGUERA, Aldo MANGIATERRA; Argentina Geovanna Alexandra Chávez Cangás, Ecuador 43