Jainita, Create a map with the line of sight you want to analyze. Reclassify it (r.reclass or r.recode) to make the cells in the line you want to analyze 1 and the rest of the cells 0.
Michael On 10/21/07 10:40 PM, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > Hi, > thank you for yr advice butcan you tell me how to prepare this binary file > > Thanks, > jainita> > > > > Jainita, >> >> Use the binary map setting to specify the area you want to do visibility >> analysis for. It should be 1 where you want visibility/los calcuations and 0 >> where you don't want this calculated. >> >> Michael >> >> >> On 10/17/07 9:30 PM, "jainita" <[EMAIL PROTECTED]> wrote: >> >>> Hi,I tried with r.los but it gives visibility all over i.e in 360degree for >>> the distance specified. >>> But I want only between two points in a line i.e not 360 degree so can you >>> help me with it. >>> I would be really oblige if you help me since I am racking my mail a lot on >>> this and still unable to find the solution >>> Thanking you once again >>> >>> -----Original Message----- >>> From: Michael Barton [mailto:[EMAIL PROTECTED] >>> Sent: Wednesday, October 17, 2007 7:59 PM >>> To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; >>> [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; >>> [EMAIL PROTECTED]; grassuser@grass.itc.it; >>> [EMAIL PROTECTED] >>> Subject: Re: r.mapcalc >>> >>> Use r.los for line of site calculations. >>> >>> Michael >>> >>> >>> On 10/17/07 5:36 AM, "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: >>> >>>> hi, >>>> i am working on grass and want to know how r.mapcalc can be used for >>>> calculation of pat_map/mask. >>>> syntax says---------------r.mapcalc pat)mkap="if(where_you_want,1, 0)" for >>>> creating a map which can be used to calcualte line of sight between two >>> points >>>> can anyone elaborate on it with an eg:say i want to know what all is beign >>>> seen between any two co-ordinate in map. >>>> Please help,i am doing for the first time >>>> >>>> Thanking You, >>>> Jainita >>> >>> __________________________________________ >>> Michael Barton, Professor of Anthropology >>> Director of Graduate Studies >>> School of Human Evolution & Social Change >>> Center for Social Dynamics & Complexity >>> Arizona State University >>> >>> phone: 480-965-6213 >>> fax: 480-965-7671 >>> www: http://www.public.asu.edu/~cmbarton >>> >>> >> >> __________________________________________ >> Michael Barton, Professor of Anthropology >> Director of Graduate Studies >> School of Human Evolution & Social Change >> Center for Social Dynamics and Complexity >> Arizona State University >> >> phone: 480-965-6213 >> fax: 480-965-7671 >> www: http://www.public.asu.edu/~cmbarton >> >> __________________________________________ Michael Barton, Professor of Anthropology Director of Graduate Studies School of Human Evolution & Social Change Center for Social Dynamics & Complexity Arizona State University phone: 480-965-6213 fax: 480-965-7671 www: http://www.public.asu.edu/~cmbarton _______________________________________________ grassuser mailing list grassuser@grass.itc.it http://grass.itc.it/mailman/listinfo/grassuser