[Qgis-user] help

[Chuck Young]

I am new to this list and hope you can help.

 I have a GeoTif raster file that currently shows  "+proj=longlat
+ellps=WGS84 +datum=WGS84 +no_defs" as its CRS in the Options form in QGIS.

I have the Tiger shapefile that has in the .prj file
GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

I have added several vector layers that I have created with QGIS and all
have the following in their .prj files.
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

I need to be able to get the Tiger data to align with the GeoTif and other
layers.

I tried to export the Tiger file using the Vector / Data Management Tools /
Export to new Projection

I first loaded two Vector layers. First a local layer that was in the
desired projection. (a layer that I created ) having the same info in the
.prj file as noted above [WGS 1984].
Then I loaded the tiget shapefile layer.

I selected the Import spacial ref from existing layer

I tried switching the input and output selections both ways:
     first I selecting local layers spacial ref system "+proj=longlat
+ellps=WGS84 +datum=WGS84 +no_defs"  as Input
        and the Tiger shapefile spacial ref "+proj=longlat +ellps=GRS80
+datum=NAD83 +no_defs" as output
This created a set of files

     Then I switched the input and output
Both produced the following in the .prj files

GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

I load any of these with the rest of the layers and zoom extents and get a
white screen with a little speck in one corner.  That speck is the raster
layer and all the layers I created manually.

I found some more info in the meta data of the different files I was asking
about.

For the locally created vector layer the mete data shows:


  Storage type of this layer: ESRI Shapefile

Source for this layer: D:/Program Files/Quantum GIS Copiapo/Rural Roads.shp

Geometry type of the features in this layer: Line

The number of features in this layer: 4

Editing capabilities of this layer: Add Features, Delete Features, Change
Attribute Values, Add Attributes, Create Spatial Index, Fast Access to
Features at ID, Change Geometries

Extents:

In layer spatial reference system units : xMin,yMin 460941.66,3797094.89 :
xMax,yMax 489349.06,3809257.00

Layer Spatial Reference System:

+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs


And for the Tiger file it shows:


  Storage type of this layer: ESRI Shapefile

Source for this layer: J:/FileTransfer/AerialPhotoGila/LandSat/GIS Data
Tiger/tl_2010_04007_roads/tl_2010_04007_roads.shp

Geometry type of the features in this layer: Line

The number of features in this layer: 14807

Editing capabilities of this layer: Add Features, Delete Features, Change
Attribute Values, Add Attributes, Create Spatial Index, Fast Access to
Features at ID, Change Geometries

Extents:

In layer spatial reference system units : xMin,yMin -111.721,32.985 :
xMax,yMax -110.001,34.4434

Layer Spatial Reference System:

+proj=longlat +ellps=GRS80 +datum=NAD83 +no_defs

Maybe this will help in your answer.


Please help!

Thanks

Chuck
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20110427/11f86210/attachment.html>