[QGIS Commit] r9989 - in docs: tags/1.0.0_user_guide
trunk/english_us/user_guide
svn_qgis at osgeo.org
svn_qgis at osgeo.org
Tue Jan 20 08:58:03 EST 2009
Author: dassau
Date: 2009-01-20 08:58:03 -0500 (Tue, 20 Jan 2009)
New Revision: 9989
Modified:
docs/tags/1.0.0_user_guide/working_with_projections.tex
docs/trunk/english_us/user_guide/working_with_projections.tex
Log:
more updates from Carson
Modified: docs/tags/1.0.0_user_guide/working_with_projections.tex
===================================================================
--- docs/tags/1.0.0_user_guide/working_with_projections.tex 2009-01-20 11:51:26 UTC (rev 9988)
+++ docs/tags/1.0.0_user_guide/working_with_projections.tex 2009-01-20 13:58:03 UTC (rev 9989)
@@ -55,9 +55,9 @@
\item \checkbox{Global default CRS displayed below will be used}
\end{itemize}
-As global default CRS \texttt{proj=longlat +ellps=WGS84 +datum=WGS84
-+no\_defs} is predefined but can be changed, of course. The definitions will
-be saved for following QGIS sessions.
+The global default CRS \texttt{proj=longlat +ellps=WGS84 +datum=WGS84
++no\_defs} comes predefined in QGIS but can of course be changed, and the new
+definition will be saved for subsequent QGIS sessions.
\begin{figure}[ht]
\begin{center}
@@ -66,17 +66,17 @@
\end{center}
\end{figure}
-If you want to define a coordinate reference system for a certain layer that
-does not provide projection information, you can also do that in the
-\tab{General} tab of the raster properties (\ref{label_generaltab}) and
-vector properties (\ref{vectorgeneraltab}) dialog. If your layer already has
-a CRS, it will be displayed as shown in Figure~\ref{fig:vector_symbology}.
+If you want to define the coordinate reference system for a certain layer
+without CRS information, you can also do that in the \tab{General} tab of the
+raster properties (\ref{label_generaltab}) and vector properties
+(\ref{vectorgeneraltab}) dialog. If your layer already has a CRS defined, it
+will be displayed as shown in Figure~\ref{fig:vector_symbology}.
\subsection{Define On The Fly (OTF) Projection}\label{label_projstart}
-QGIS does not have OTF projection enabled per default and it is currently
-only supported for vector layers. To use OTF projection, you must open the
-\dropmenuopttwo{mActionOptions}{Project Properties} dialog, select a
+QGIS does not have OTF projection enabled by default, and this function is
+currently only supported for vector layers. To use OTF projection, you must
+open the \dropmenuopttwo{mActionOptions}{Project Properties} dialog, select a
CRS and activate the \checkbox{Enable on the fly projection} checkbox.
There are two ways to open the dialog:
@@ -87,11 +87,12 @@
lower right-hand corner of the statusbar.
\end{enumerate}
-If you have already loaded a layer and want to enable OTF projection, you
-have to open the \tab{Coordinate Reference System} tab of the \dialog{Project
-Properties} dialog and find the CRS of the already loaded layer in the list
-of CRS and activate the \checkbox{Enable on the fly projection} checkbox. All
-vector layers loaded afterwards will then be OTF projected to the defined CRS.
+If you have already loaded a layer, and want to enable OTF projection, the
+best practice is to open the \tab{Coordinate Reference System} tab of the
+\dialog{Project Properties} dialog and find the CRS of the currently loaded
+layer in the list of CRS, and activate the \checkbox{Enable on the fly
+projection} checkbox. All subsequently loaded vector layers will then be OTF
+projected to the defined CRS.
The \tab{Coordinate Reference System} tab of the \dialog{Project Properties}
dialog contains four important components as numbered in Figure
@@ -106,10 +107,10 @@
\begin{enumerate}
\item \textbf{Enable on the fly projection}\index{Projections!enabling} -
-this checkbox is used to enable or disable OTF projection. When off, no
-projection takes place and each layer is drawn using the coordinates as read
-from the data source. When on, the coordinates in each layer are projected to
-the coordinate reference system defined for the map canvas.
+this checkbox is used to enable or disable OTF projection. When off, each
+layer is drawn using the coordinates as read from the data source. When on,
+the coordinates in each layer are projected to the coordinate reference
+system defined for the map canvas.
\item \textbf{Coordinate Reference System} - this is a list of all CRS
supported by QGIS, including Geographic, Projected and Custom coordinate
reference systems. To use a CRS, select it from the list by expanding
@@ -154,8 +155,8 @@
for the UNIX Environment - A User's Manual by Gerald I. Evenden, U.S.
Geological Survey Open-File Report 90-284, 1990 (available at \url{ftp://ftp.remotesensing.org/proj/OF90-284.pdf}).
This manual describes the use of the \usertext{proj.4} and related command line
-utilities. The cartographic parameters used with \usertext{proj.4} and described
-in the user manual are the same as those used by QGIS.
+utilities. The cartographic parameters used with \usertext{proj.4} are
+described in the user manual, and are the same as those used by QGIS.
The \dialog{Custom Coordinate Reference System Definition} dialog requires
only two parameters to define a user CRS:
@@ -170,10 +171,6 @@
Note that the \guilabel{Parameters} must begin with a \usertext{+proj=}-block,
to represent the new coordinate reference system.
-Figure \ref{fig:customprojections} shows the dialog with an example CRS. The
-parameters shown were entered based on a knowledge of the CRS and the
-information found in OF90-284.
-
You can test your CRS parameters to see if they give sane results by
clicking on the \button{Calculate} button inside the \guiheading{Test} block
and pasting your CRS parameters into
Modified: docs/trunk/english_us/user_guide/working_with_projections.tex
===================================================================
--- docs/trunk/english_us/user_guide/working_with_projections.tex 2009-01-20 11:51:26 UTC (rev 9988)
+++ docs/trunk/english_us/user_guide/working_with_projections.tex 2009-01-20 13:58:03 UTC (rev 9989)
@@ -55,9 +55,9 @@
\item \checkbox{Global default CRS displayed below will be used}
\end{itemize}
-As global default CRS \texttt{proj=longlat +ellps=WGS84 +datum=WGS84
-+no\_defs} is predefined but can be changed, of course. The definitions will
-be saved for following QGIS sessions.
+The global default CRS \texttt{proj=longlat +ellps=WGS84 +datum=WGS84
++no\_defs} comes predefined in QGIS but can of course be changed, and the new
+definition will be saved for subsequent QGIS sessions.
\begin{figure}[ht]
\begin{center}
@@ -66,17 +66,17 @@
\end{center}
\end{figure}
-If you want to define a coordinate reference system for a certain layer that
-does not provide projection information, you can also do that in the
-\tab{General} tab of the raster properties (\ref{label_generaltab}) and
-vector properties (\ref{vectorgeneraltab}) dialog. If your layer already has
-a CRS, it will be displayed as shown in Figure~\ref{fig:vector_symbology}.
+If you want to define the coordinate reference system for a certain layer
+without CRS information, you can also do that in the \tab{General} tab of the
+raster properties (\ref{label_generaltab}) and vector properties
+(\ref{vectorgeneraltab}) dialog. If your layer already has a CRS defined, it
+will be displayed as shown in Figure~\ref{fig:vector_symbology}.
\subsection{Define On The Fly (OTF) Projection}\label{label_projstart}
-QGIS does not have OTF projection enabled per default and it is currently
-only supported for vector layers. To use OTF projection, you must open the
-\dropmenuopttwo{mActionOptions}{Project Properties} dialog, select a
+QGIS does not have OTF projection enabled by default, and this function is
+currently only supported for vector layers. To use OTF projection, you must
+open the \dropmenuopttwo{mActionOptions}{Project Properties} dialog, select a
CRS and activate the \checkbox{Enable on the fly projection} checkbox.
There are two ways to open the dialog:
@@ -87,11 +87,12 @@
lower right-hand corner of the statusbar.
\end{enumerate}
-If you have already loaded a layer and want to enable OTF projection, you
-have to open the \tab{Coordinate Reference System} tab of the \dialog{Project
-Properties} dialog and find the CRS of the already loaded layer in the list
-of CRS and activate the \checkbox{Enable on the fly projection} checkbox. All
-vector layers loaded afterwards will then be OTF projected to the defined CRS.
+If you have already loaded a layer, and want to enable OTF projection, the
+best practice is to open the \tab{Coordinate Reference System} tab of the
+\dialog{Project Properties} dialog and find the CRS of the currently loaded
+layer in the list of CRS, and activate the \checkbox{Enable on the fly
+projection} checkbox. All subsequently loaded vector layers will then be OTF
+projected to the defined CRS.
The \tab{Coordinate Reference System} tab of the \dialog{Project Properties}
dialog contains four important components as numbered in Figure
@@ -106,10 +107,10 @@
\begin{enumerate}
\item \textbf{Enable on the fly projection}\index{Projections!enabling} -
-this checkbox is used to enable or disable OTF projection. When off, no
-projection takes place and each layer is drawn using the coordinates as read
-from the data source. When on, the coordinates in each layer are projected to
-the coordinate reference system defined for the map canvas.
+this checkbox is used to enable or disable OTF projection. When off, each
+layer is drawn using the coordinates as read from the data source. When on,
+the coordinates in each layer are projected to the coordinate reference
+system defined for the map canvas.
\item \textbf{Coordinate Reference System} - this is a list of all CRS
supported by QGIS, including Geographic, Projected and Custom coordinate
reference systems. To use a CRS, select it from the list by expanding
@@ -154,8 +155,8 @@
for the UNIX Environment - A User's Manual by Gerald I. Evenden, U.S.
Geological Survey Open-File Report 90-284, 1990 (available at \url{ftp://ftp.remotesensing.org/proj/OF90-284.pdf}).
This manual describes the use of the \usertext{proj.4} and related command line
-utilities. The cartographic parameters used with \usertext{proj.4} and described
-in the user manual are the same as those used by QGIS.
+utilities. The cartographic parameters used with \usertext{proj.4} are
+described in the user manual, and are the same as those used by QGIS.
The \dialog{Custom Coordinate Reference System Definition} dialog requires
only two parameters to define a user CRS:
@@ -170,10 +171,6 @@
Note that the \guilabel{Parameters} must begin with a \usertext{+proj=}-block,
to represent the new coordinate reference system.
-Figure \ref{fig:customprojections} shows the dialog with an example CRS. The
-parameters shown were entered based on a knowledge of the CRS and the
-information found in OF90-284.
-
You can test your CRS parameters to see if they give sane results by
clicking on the \button{Calculate} button inside the \guiheading{Test} block
and pasting your CRS parameters into
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