Add simple swap data filter.

diff --git a/xmldoc/filters/swap.xml b/xmldoc/filters/swap.xml
new file mode 100644 (file)
index 0000000..7665790
--- /dev/null
+++ b/xmldoc/filters/swap.xml
@@ -0,0 +1,5 @@
+<para>
+   Simple filter to swap the coordinate values (latitude and longitude) of all
+   points. This can be helpful for wrong defined/coded data. Or if you think, you can use
+   one of our xcsv formats, but latitude and longitude are in opposite order.
+</para>