News & Blog
Yellowfin Quick How To – Latitude & Longitude to Geometry
13 Mar, 2012
- Teresa Pringle
How can I use my current Latitude and Longitude data to create GIS maps without adding anything to my source database?
Firstly, you will need to create a field containing your Latitude and Longitude data in a format Yellowfin can use for GIS mapping. You’ll then need to convert the field to geometry, ready to be used in maps.
1. Create a calculated field in your view that follows this template:
‘POINT(‘ + latitudeField + ‘ ‘ + longitudeField + ‘)’
If your latitude is -37.83 and longitude is 145.03 then the result of the calculated field should be: POINT(-37.83 145.03).
you can create this calculation using either the Formula Builder or FreehandSQL field types, depending on how comfortable you are with SQL.
2. Now format the field, adding a converter on the Data Conversion tab.
You will need to add the WKT Geometry Converter
. The Text Format
option allows you to choose which order you put the latitude and longitude fields in your calculation, in this example select Latitude/Longitude
You should now have a field that’s ready for use in Yellowfin’s GIS maps