[gdal-dev] convert shapefile from California State Plane to EPSG:4326

[Andre Joost]

Am 09.02.2016 um 03:35 schrieb maning sambale:
> Thanks Daniel and Even,
>
> Using following Even's advice, I get better results:
> https://gist.github.com/maning/093a866fd465ea880032#better-conversion
>
>> Wondering if it might be appropriate to change proj.4 defaults to the above ?
>
> +1

The datum shift between WGS84 and NAD83 is related to the tectonic plate 
shift, which varies across North America, and over the time.

So it makes not much sense to change the proj.4 values, unless it is 
checked for accuracy at several places across the continent, and bound 
to a certain time.

Locally, you get good fitting vectors and images if you use the same 
shift as was used for georeferencing the orthoimages.

Greetings,
André Joost