I have more than 50,000 LatLng coordinates defined under SWREFF99 1800 projection. I want to know, is it possible to convert these coordinates into a point shapefile ? if yes, then how can I do this ?
You can use GDAL and the ogr2ogr command line utility, but first you need to create a VRT driver.
For example (as suggested in the GDAL doc):
Latitude,Longitude,Name 48.1,0.25,"First point" 49.2,1.1,"Second point" 47.5,0.75,"Third point"
This is your vrt driver:
<OGRVRTDataSource> <OGRVRTLayer name="test"> <SrcDataSource>test.csv</SrcDataSource> <GeometryType>wkbPoint</GeometryType> <LayerSRS>WGS84</LayerSRS> <GeometryField encoding="PointFromColumns" x="Longitude" y="Latitude"/> </OGRVRTLayer> </OGRVRTDataSource>
Finally use ogr2ogr to convert your test.vrt in a shapefile:
ogr2ogr -f "ESRI Shapefile" output.shp test.vrt
With Qgis, you can import your coordinates with the Delimited text plugin.
If you are using ArcGIS, use the Make XY Event Table tool . To persist the output of that tool to a shpfile/gdb, see the second bullet in the tool doc.
Easy done in MapInfo Professional too by create points from XY, set your coordsys and output as a shapefile.