Re: how to calculate the area of polygon?
Peter Schmidt <[email protected]>
| Newsgroups | gmane.comp.gis.gmt.user |
|---|---|
| Message-ID | <[email protected]> |
In GMT5 you can do this using gmtspatial, If you are stuck with GMT4 it should be possible to do so using grdvolume if you first define a grid file in which all the points inside your polygon has a constant value differing from the points outside, then apply grdcontour to the countour value equal to the value you have chosen inside your polygon. regP On 11/28/2013 03:35 PM, Namba Takaya wrote: > Dear sir > > > Could you tell me how to calculate the area of polygon(hour points) like > > 1. 5:00E 55:00S > 2. 6:00E 55:00S > 3. 6:00E 56:00S > 4. 5:00E 56:00S > > regards, > > takaya -- ******************************************************************************** Peter Schmidt Tel: +46-18-4717104 Swedish National Seismological Network (SNSN) Mobile: +46-73-3190975 Dept. of Earth Sciences:geophysics e-mail: [email protected] Uppsala University Villavagen 16 SE-75236 Uppsala ******************************************************************************** To unsubscribe, send the message "signoff gmt-help" to [email protected]