Re: [GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
Dear all: I solved this problem at last ! Well, I found the method of installing grass6.4 on ubuntu 9.04. http://les-ejk.cz/2009/05/grass-64-rc4-for-ubuntu-904/ I want to say the reward to you. Thank you ! However, I have the relating question... I am also linux- beginner user. #db.select point_data fs=, result.csv #bash: result.csv: Permission denied Why does this occur? It was not generated in the old version. Yasuo shimada - sgw00...@nifty.comさん： Dear Hamish and Milton: Thank you good advice and kind message. I intend to install (compile) a new version, 6.3 or more. Best Yasuo shimada -- Hamish hamis...@yahoo.comさん： sgw00412 wrote: I tested by two kinds of geographical coordinate systems by using the same data. One of the geographical coordinate systems is UTM54, and the remainder is wgs84. data :point vector data (10 points) and a line vector data OS: grass 6.2.3 on Cygwin. As a result, the case of UTM54 obtained the distance of meter. On the other hand, wgs84 obtained the distance of decimal value. So, I guess that the decimal value of wgs84 is a degree of latitude longitude. Grass manual wrote that ...In lat-long locations v.distance gives distances (dist and to_along) in meters not in degrees calculated as geodesic distances on a sphere.. http://www.ces.iisc.ernet.in/grass/grass64/manuals/html64_user/v.distance.html Though this manual is version 6.4, the manual of version 6.2 is not written it. Is this interpretation correct? If it is so, please teach me the method of converting the decimal value into the meter. Yes, version 6.2.3 is giving distances in (useless) degree units. This was fixed in Jan 2008 by Martin to use geodesic distance in meters, so GRASS 6.3.0 and the upcoming 6.4 do return meters. But 6.2.3 was released in Nov 2007 and so is too old to have that fix. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
Yasuo shimada wrote: However, I have the relating question... I am also linux- beginner user. #db.select point_data fs=, result.csv #bash: result.csv: Permission denied Why does this occur? probably because you are trying to write a file to the disk in the current directory, and you are in a read-only directory such as /. do cd ~ or cd /tmp/ and try again. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
Dear milton and Hamish mitton wrote: db.select point_data fs=, /home/YOURNORMALUSER/result.csv Hamish wrote: probably because you are trying to write a file to the disk in the current directory, and you are in a read-only directory such as /. do cd ~ or cd /tmp/ and try again. Great !! All my problems were completely solved. I think that the mailing list of grass is wonderful. Thank you !! Best yasuo shimada --- Hamish hamis...@yahoo.comさん： Yasuo shimada wrote: However, I have the relating question... I am also linux- beginner user. #db.select point_data fs=, result.csv #bash: result.csv: Permission denied Why does this occur? probably because you are trying to write a file to the disk in the current directory, and you are in a read-only directory such as /. do cd ~ or cd /tmp/ and try again. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
sgw00412 wrote: I tested by two kinds of geographical coordinate systems by using the same data. One of the geographical coordinate systems is UTM54, and the remainder is wgs84. data :point vector data (10 points) and a line vector data OS: grass 6.2.3 on Cygwin. As a result, the case of UTM54 obtained the distance of meter. On the other hand, wgs84 obtained the distance of decimal value. So, I guess that the decimal value of wgs84 is a degree of latitude longitude. Grass manual wrote that ...In lat-long locations v.distance gives distances (dist and to_along) in meters not in degrees calculated as geodesic distances on a sphere.. http://www.ces.iisc.ernet.in/grass/grass64/manuals/html64_user/v.distance.html Though this manual is version 6.4, the manual of version 6.2 is not written it. Is this interpretation correct? If it is so, please teach me the method of converting the decimal value into the meter. Yes, version 6.2.3 is giving distances in (useless) degree units. This was fixed in Jan 2008 by Martin to use geodesic distance in meters, so GRASS 6.3.0 and the upcoming 6.4 do return meters. But 6.2.3 was released in Nov 2007 and so is too old to have that fix. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
Re: [GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
Hi all, May be our friend Yasuo shimada are suffering for the absence of binary version newest than 6.2 on linux? regards, milton 2009/5/13 Hamish hamis...@yahoo.com sgw00412 wrote: I tested by two kinds of geographical coordinate systems by using the same data. One of the geographical coordinate systems is UTM54, and the remainder is wgs84. data :point vector data (10 points) and a line vector data OS: grass 6.2.3 on Cygwin. As a result, the case of UTM54 obtained the distance of meter. On the other hand, wgs84 obtained the distance of decimal value. So, I guess that the decimal value of wgs84 is a degree of latitude longitude. Grass manual wrote that ...In lat-long locations v.distance gives distances (dist and to_along) in meters not in degrees calculated as geodesic distances on a sphere.. http://www.ces.iisc.ernet.in/grass/grass64/manuals/html64_user/v.distance.html Though this manual is version 6.4, the manual of version 6.2 is not written it. Is this interpretation correct? If it is so, please teach me the method of converting the decimal value into the meter. Yes, version 6.2.3 is giving distances in (useless) degree units. This was fixed in Jan 2008 by Martin to use geodesic distance in meters, so GRASS 6.3.0 and the upcoming 6.4 do return meters. But 6.2.3 was released in Nov 2007 and so is too old to have that fix. Hamish ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
[GRASS-user] RE:How to find shortest distances from the investigation point to the shoreline
Hi all I'm sorry for repeating the same question. I tested by two kinds of geographical coordinate systems by using the same dat a. One of the geographical coordinate systems is UTM54, and the remainder is wgs8 4. data :point vector data (10 points) and a line vector data OS: grass 6.2.3 on Cygwin. As a result, the case of UTM54 obtained the distance of meter. On the other ha nd, wgs84 obtained the distance of decimal value. So, I guess that the decimal value of wgs84 is a degree of latitude longitude. Grass manual wrote that ...In lat-long locations v.distance gives distances ( dist and to_along) in meters not in degrees calculated as geodesic distances o n a sphere.. http://www.ces.iisc.ernet.in/grass/grass64/manuals/html64_user/v.distance.html Though this manual is version 6.4, the manual of version 6.2 is not written it . Is this interpretation correct? If it is so, please teach me the method of converting the decimal value into t he meter. --- PROJCS[Transverse Mercator, GEOGCS[unnamed, DATUM[unknown, SPHEROID[unnamed,6378137,298.257222101], TOWGS84[0,0,0,0,0,0,0]], PRIMEM[Greenwich,0], UNIT[degree,0.0174532925199433]], PROJECTION[Transverse_Mercator], PARAMETER[latitude_of_origin,0], PARAMETER[central_meridian,141], PARAMETER[scale_factor,0.9996], PARAMETER[false_easting,50], PARAMETER[false_northing,0], UNIT[metre,1]] cat,UserID,distance 1,0,324.231475 2,0,170.339585 3,0,338.095708 4,0,347.756189 5,0,143.91159 6,0,156.702461 7,0,336.369666 8,0,178.761379 9,0,163.440513 10,0,122.997484 --- GEOGCS[wgs84, DATUM[WGS_1984, SPHEROID[wgs84,6378137,298.257223563]], PRIMEM[Greenwich,0], UNIT[degree,0.0174532925199433]] cat,UserID,distance 1,0,0.003779 2,0,0.00198 3,0,0.003937 4,0,0.004053 5,0,0.001677 6,0,0.001826 7,0,0.003048 8,0,0.002084 9,0,0.001484 10,0,0.001113 - Yasuo shimada ___ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
