[OSGeo Africa] Problem displaying both Google earth image and farm boundary layers on map canvass

[Chris Berens]

In your pts XY table that you included in your mail you have minuses in
front of your eastings (these should probably refer to southings...check
all).  Also, your X value of pt1 is the same as the Y value...of pt1




On 10 October 2013 15:22, Jeffery Hlongwane <jeffhlongs at gmail.com> wrote:

> Hi Chris
>
> I did try on the fly reprojection but with no expected outcome.
>
> With thanks
>
> Jeffery Hlongwane
>
> On 10/10/13, Chris Berens <chris at mapland.co.za> wrote:
> > Dude! Have you tried Project properties>Settings>CRS>Enable on the fly
> > reprojection?
> >
> >
> >
> >
> > On 10 October 2013 13:46, Jeffery Hlongwane <jeffhlongs at gmail.com>
> wrote:
> >
> >> Hi
> >>
> >> I am trying to align google image (georeferenced) with the farm
> >> boundaries layer on QGIS. However, my challenge is only one layer
> >> appears on map canvas and can only see the other via zoom to extent
> >> option which automatically removes previously displayed layer from map
> >> canvas. Can you please assist me? For now I can provide the following
> >> further details.
> >>
> >> >>>The software I am using on my machine windows 7 machine is QGIS 1.8
> >> Lisboa.  Georeferencing was based on the following coordinates control
> >> points from Google Map.
> >>
> >> Points  X                         Y
> >> p1      ­ - 25°40'40.58"S        25°40'40.58"S
> >> p2       -28°23'58.19"E  25°40'41.81"S
> >> p3       -28°23'32.75"E  25°40'57.56"S
> >>
> >> >>>When comes to transformation settings I used linear type, resampling
> >> method was nearest neighbour and lastly the target srs was EPSG 4326.
> >>
> >> -Google georeferenced image's Spatial Layer extent :
> >> 28.3874623288009538,25.6655111594936081  :
> >> 28.4012727306202954,25.6753215312726546
> >> Google image spatial reference system : +proj=longlat +datum=WGS84
> >> +no_defs
> >> Farm boundaries layer extents:
> >> On QGIS  : Spatial reference system units : xMin,yMin 26.6218,-27.0627
> >> : xMax,yMax 29.8673,-25.1096   Spatial Reference System: +proj=longlat
> >> +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +no_defs
> >> Original projection details :
> >>
> >>
> GEOGCS["GCS_Hartebeesthoek_1994",DATUM["D_Hartebeesthoek_1994",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]
> >> >>> I also used checked the box for on the fly option and used WGS84.
> >> >>> I've
> >> trying for several times and now feel I can give a shout for help. Thank
> >> you in advance.
> >>
> >>
> >> Yours Sincerely
> >>
> >> Jeffery Hlongwane
> >> _______________________________________________
> >> Africa mailing list
> >> Africa at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/africa
> >>
> >>
> >
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