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On 04/27/2011 08:51 PM, Chuck Young wrote:
<blockquote
cite="mid:BANLkTikM4PzdyNv2=aAzP1SfGHyZZ68r=g@mail.gmail.com"
type="cite">I am new to this list and hope you can help. <br>
<br>
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.<br>
<br>
<font face="Arial" size="2">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]]<br>
<br>
I have added several vector layers that I have created with QGIS
and all have the following in their .prj files.<br>
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]<br>
<br>
I need to be able to get the Tiger data to align with the GeoTif
and other layers.<br>
<br>
</font></blockquote>
<br>
Assuming your *.prj files are correct, you should be able to enable
"on-the-fly" projection and the Tiger shapefiles should fall in the
correct place.<br>
You need to:<br>
* first load the GeoTiff, <br>
* open the project properties, and be sure the CRS is set the same
as the GeoTiff (EPSG 4326 based on what you posted above)<br>
* in the same project properties window, check the "Enable
on-the-fly" checkbox.<br>
* Now load the tiger shapefiles.<br>
<br>
That should do it.<br>
<br>
<blockquote
cite="mid:BANLkTikM4PzdyNv2=aAzP1SfGHyZZ68r=g@mail.gmail.com"
type="cite"><font face="Arial" size="2">I tried to export the
Tiger file using the Vector / Data Management Tools / Export to
new Projection<br>
<br>
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].<br>
Then I loaded the tiget shapefile layer. <br>
<br>
I selected the Import spacial ref from existing layer<br>
<br>
I tried switching the input and output selections both ways:<br>
first I selecting local layers spacial ref system
"+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs" as Input <br>
and the Tiger shapefile spacial ref "+proj=longlat
+ellps=GRS80 +datum=NAD83 +no_defs" as output<br>
This created a set of files <br>
<br>
Then I switched the input and output <br>
Both produced the following in the .prj files<br>
<br>
</font><font face="Arial" size="2">GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]<br>
GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137,298.257223563]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]<br>
</font><br>
<font face="Arial" size="2">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.<br>
<br>
</font>I found some more info in the meta data of the different
files I was asking about. <br>
<br>
For the locally created vector layer the mete data shows:<br>
<br>
<br>
<table style="width: 100%;" width="100%" border="0"
cellpadding="0">
<tbody>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Storage type of this layer: ESRI
Shapefile</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Source for this layer: D:/Program
Files/Quantum GIS Copiapo/Rural Roads.shp</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Geometry type of the features in this
layer: Line</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">The number of features in this layer: 4</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">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</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: white;">Extents:</span><span style="font-size:
12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">In layer spatial reference system units
: xMin,yMin 460941.66,3797094.89 : xMax,yMax
489349.06,3809257.00</span><span style="font-size:
12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: white;">Layer Spatial Reference System:</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">+proj=longlat +ellps=WGS84 +datum=WGS84
+no_defs</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
</tbody>
</table>
<br>
<br>
And for the Tiger file it shows:<br>
<br>
<br>
<table style="width: 100%;" width="100%" border="0"
cellpadding="0">
<tbody>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Storage type of this layer: ESRI
Shapefile</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Source for this layer:
J:/FileTransfer/AerialPhotoGila/LandSat/GIS Data
Tiger/tl_2010_04007_roads/tl_2010_04007_roads.shp</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">Geometry type of the features in this
layer: Line</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">The number of features in this layer:
14807</span><span style="font-size: 12pt; font-family:
"Times New Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">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</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: white;">Extents:</span><span style="font-size:
12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">In layer spatial reference system units
: xMin,yMin -111.721,32.985 : xMax,yMax
-110.001,34.4434</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: white;">Layer Spatial Reference System:</span><span
style="font-size: 12pt; font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
<tr>
<td style="padding: 0in;">
<p class="MsoNormal" style="margin-bottom: 0.0001pt;
line-height: normal;"><span style="font-size: 12pt;
color: black;">+proj=longlat +ellps=GRS80 +datum=NAD83
+no_defs</span><span style="font-size: 12pt;
font-family: "Times New
Roman","serif";"></span></p>
</td>
</tr>
</tbody>
</table>
<br>
Maybe this will help in your answer.<br>
<font face="Arial" size="2"><br>
<br>
Please help!<br>
<br>
Thanks<br>
<br>
Chuck<br>
<br>
</font>
<br>
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</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Micha Silver
Arava Development Co. +972-52-3665918
<a class="moz-txt-link-freetext" href="http://www.surfaces.co.il">http://www.surfaces.co.il</a>
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