[Proj] load arcSDE raw data from database and convert to lat/long

[Jose Gonçalves]

You should first look carefully at you data. In your first e-mail you said
one of the points was:

"X = 1550428 Y = 2447336 and should be a point closer to lat = 41,8905198
lng = 12,4942486"

The geographic coordinates correspond in fact to a point in Rome. But now
you give X,Y coordinates like

2447857 1069853

If coordinates are meters, this point is very far from Rome, even if you
change the order in one of the points!...

Regards

José



2011/11/11 Vincenzo Ampolo <vincenzo.ampolo at gmail.com>

>  On 11/11/2011 11:28 AM, JAG wrote:
>
> Looking only to the geographic coordinates, the differences are 3.6 deg in latitude and 3.3 deg in longitude. That is approximately 400 km in latitude and 270 km in longitude, which does not agree with the area you refer.
>
> Regards
>
> José
>
>  Sorry, i didn't mean that the two points are close together. They are
> from different datasets.
>
> I've 40.000 points which are all close to
>
> lat = 41,8905198
> lng = 12,4942486
>
> Which is Rome (italy)
>
> And other 40.000 points which are all close to
>
> lat = 45,463681
> lng = 9,1881714
>
> which is Milan (Italy)
>
> This is some data i've for the first set of points (around Rome)
>
>   *GeoX (M)* *GeoY (N)* *Colonna comune (B)* *Colonna indirizzo (D)*
> 2447857 1069853 ROMA CIRCONVALLAZIONE GIANICOLENSE  2447336 1075588 ROMA CIRCONVALLAZIONE
> CLODIA  2447336 1075588 ROMA CIRCONVALLAZIONE CLODIA  2451643 1077238 ROMA VIALE
> SOMALIA  2447857 1069853 ROMA CIRCONVALLAZIONE GIANICOLENSE  2457129
> 1068315 ROMA CIRCONVALLAZIONE TUSCOLANA  2457129 1068315 ROMA CIRCONVALLAZIONE
> TUSCOLANA  2448230 1077592 ROMA CORSO DI FRANCIA  2448560 1069650 ROMA PIAZZA
> DELLA RADIO  2456036 1078472 ROMA VIA DIEGO FABBRI  2446575 1067372 ROMA VIALE
> ISACCO NEWTON  2448230 1077592 ROMA CORSO DI FRANCIA  2448230 1077592 ROMA CORSO
> DI FRANCIA  2448850 1072702 ROMA CORSO VITTORIO EMANUELE II  2451492
> 1068723 ROMA LARGO BENEDETTO BOMPIANI  2454671 1080064 ROMA VIA FRANCO
> SIMONGINI  2447642 1078350 ROMA VIA DI VIGNA STELLUTI  2447642 1078350
> ROMA VIA DI VIGNA STELLUTI  2447642 1078350 ROMA VIA DI VIGNA STELLUTI
> 2447642 1078350 ROMA VIA DI VIGNA STELLUTI  2447642 1078350 ROMA VIA DI
> VIGNA STELLUTI  2450834 1067730 ROMA PIAZZALE DEL CARAVAGGIO  2447187
> 1074983 ROMA PIAZZALE CLODIO  2447187 1074983 ROMA PIAZZALE CLODIO
> 2446665 1073922 ROMA PIAZZALE DEGLI EROI  2448836 1074408 ROMA PIAZZALE
> FLAMINIO  2447369 1075612 ROMA PIAZZALE MARESCIALLO GIARDINO  2447369
> 1075612 ROMA PIAZZALE MARESCIALLO GIARDINO  2448234 1076254 ROMA PIAZZA
> APOLLODORO  2452382 1080020 ROMA PIAZZA DELL'ATENEO SALESIANO  2448494
> 1073731 ROMA PIAZZA CAVOUR  2456566 1070962 ROMA PIAZZA DELLE CAMELIE
> 2451500 1076660 ROMA PIAZZA DI PRISCILLA  2447346 1076534 ROMA PIAZZA
> LAURO DE BOSIS  2447584 1076916 ROMA PIAZZALE MARESCIALLO DIAZ  2447584
> 1076916 ROMA PIAZZALE MARESCIALLO DIAZ  2448307 1075184 ROMA PIAZZA MONTE
> GRAPPA  2445891 1072333 ROMA PIAZZA PIO XI  2447714 1078540 ROMA PIAZZA
> STEFANO JACINI
> Thanks for all.
>
> --
> Vincenzo Ampolohttp://vincenzo-ampolo.nethttp://goshawknest.wordpress.com
>
>
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