[gdal-dev] shape file to GMT dem file
Tyler Mitchell
tyler.mitchell at actian.com
Wed Jan 30 09:47:52 PST 2013
Glad you had some success Murat!
Are you okay now or you have more questions?
Best wishes,
Tyler
On 2013-01-30, at 12:49 AM, Murat Beyhan wrote:
> Dear Tyler,
> I really thank you, you gave me very useful hints.
> Yes As you say I have obtain point data from shape file than I use Qgis
> to obtain point file using extract node. (By the way is it possible to
> do this using command line in terminal.)
> then I have used gdal_grid to obtain grid data than I used Raster
> Analysis DEM models in qgis. (by the way it took long and long time to
> do this for one threader. about 5 minutes)
> The example jpeg file is in this email. But I wonder the sensitivity of
> gridded data using qgis.
>
> Thanks for your help after one week I took way in my job.
> Warm regards...
> murat
>
>
> On Tue, 2013-01-29 at 14:11 -0800, Tyler Mitchell wrote:
>> Do you have elevation data stored in the source data somewhere? You
>> can convert lines to points using QGIS Vector tool -> Extract Nodes,
>> but if you do not have elevation values stored in the attribute table
>> for the lines, it won't help you :)
>>
>>
>> Feel free to share a zipped set of files with me (directly) if you
>> want me to take a peek.
>>
>>
>> Tyler
>>
>> On 2013-01-29, at 1:28 PM, Murat BEYHAN wrote:
>>
>>> Dear Mitchell,
>>> Thanks for repply me.
>>> As you say I have to obtain point data first. If I would able to
>>> obtain xyz data it will be easy using GMT xyz2grd.
>>> But my problem I could not do that. So I produced point data using
>>> ogr2ogr command and it is drawn by qgis well
>>> The picture on this mail. Lines belongs shapefile and points
>>> belongs GMT data. But there is a problem its atribute table are
>>> null
>>> and ogrinfo gives 0.0 for the field structure. So is this normal or
>>> not. And I couldn't achieve to use gdal_grid using GMT data file.
>>> Do you have any idea, please.
>>> Thanks
>>>
>>> murat at murat:~/maps$ ogr2ogr -f "GMT" -nlt point test1.gmt
>>> e34c3_n.shp
>>> murat at murat:~/maps$ ogrinfo -so -al test1.gmt
>>> INFO: Open of `test1.gmt'
>>> using driver `GMT' successful.
>>>
>>> Layer name: test1
>>> Geometry: Point
>>> Feature Count: 341440
>>> Extent: (697857.170000, 4597069.190000) - (708674.200000,
>>> 4611236.780000)
>>> Layer SRS WKT:
>>> (unknown)
>>> UserId: Real (0.0)
>>> FNODE_: Real (0.0)
>>> TNODE_: Real (0.0)
>>> LPOLY_: Real (0.0)
>>> RPOLY_: Real (0.0)
>>> LENGTH: Real (0.0)
>>> CVRGE34C3#: Integer (0.0)
>>> CVRGE34C3-: Integer (0.0)
>>> DETAY: String (0.0)
>>> SEMBOL: Integer (0.0)
>>> YUKSEKLIK: Real (0.0)
>>>
>>>
>>>
>>>
>>>
>>> On Tue, 29 Jan 2013 12:05:17 -0800, Tyler Mitchell wrote
>>>> gdal_grid command can convert OGR to GDAL formats, but you need to
>>> only have point data. Your line shape file won't work with it.
>>>> So if you can convert your lines into a set of points, and you
>>> will need a Z or elevation point or attribute to point gdal_grid
>>> to.
>>>>
>>>> Perhaps you already have the point data in your grass dataset that
>>> you could export to GDAL. But I also suspect you just do all you
>>> need to in grass itself.
>>>>
>>>> Tyler
>>>>
>>>> On 2013-01-29, at 11:04 AM, Murat BEYHAN wrote:
>>>>
>>>>> Dear All,
>>>>>
>>>>> Is it possible to obtain dem grid data from shapefile using gdal
>>>> or ogr.
>>>>> info about shape file as follows
>>>>>
>>>>> murat at murat:~/maps$ ogrinfo -so -al e34c3_n.shp
>>>>> INFO: Open of `e34c3_n.shp'
>>>>> using driver `ESRI Shapefile' successful.
>>>>>
>>>>> Layer name: e34c3_n
>>>>> Geometry: Line String
>>>>> Feature Count: 4047
>>>>> Extent: (697857.170000, 4597069.190000) - (708674.200000,
>>>> 4611236.780000)
>>>>> Layer SRS WKT:
>>>>> (unknown)
>>>>> UserId: Real (11.0)
>>>>> FNODE_: Real (11.0)
>>>>> TNODE_: Real (11.0)
>>>>> LPOLY_: Real (11.0)
>>>>> RPOLY_: Real (11.0)
>>>>> LENGTH: Real (18.5)
>>>>> CVRGE34C3#: Integer (5.0)
>>>>> CVRGE34C3-: Integer (5.0)
>>>>> DETAY: String (12.0)
>>>>> SEMBOL: Integer (3.0)
>>>>> YUKSEKLIK: Real (12.3)
>>>>>
>>>>> I have installed and use grass, GMT and qgis, but I'm not good
>>>> at GIS. My
>>>>> purpose is to obtain slope map of topographic data.
>>>>>
>>>>> any suggestion appreciated.
>>>>> Regards
>>>>>
>>>>> Murat
>>>>>
>>>>> --
>>>>> This message has been scanned for viruses and
>>>>> dangerous content by MailScanner, and is
>>>>> believed to be clean.
>>>>>
>>>>> _______________________________________________
>>>>> gdal-dev mailing list
>>>>> gdal-dev at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>
>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>>
>>>>
>>>
>>>> Tyler Mitchell
>>>> Engineering Director
>>>> Actian Corporation
>>>>
>>> tyler.mitchell at actian.com
>>>>
>>>>
>>>
>>>> MOBILE 250-303-1831
>>>> SKYPE spatialguru
>>>> www.actian.com
>>>>
>>>
>>>>
>>>> --
>>>> This message has been scanned for viruses and
>>>> dangerous content by MailScanner, and is
>>>> believed to be clean.
>>>
>>>
>>> Murat Beyhan
>>> Jeofizik Yük. Müh.
>>> T.C.
>>> BAŞBAKANLIK
>>> Afet ve Acil Durum Yönetimi Başkanlığı
>>> Deprem Dairesi Başkanlığı
>>> Eskişehir Yolu 12. Km. Lodumlu/Ankara
>>> Tel:+90 (312) 2872680-1550
>>>
>>>
>>> --
>>> This message has been scanned for viruses and
>>> dangerous content by MailScanner, and is
>>> believed to be clean.
>>> <map.jpg>
>>
>>
>>
>>
>> Tyler Mitchell
>> Engineering Director
>> Actian Corporation
>>
>> tyler.mitchell at actian.com
>>
>>
>> MOBILE 250-303-1831
>> SKYPE spatialguru
>> www.actian.com
>>
>>
>>
>>
>> --
>> This message has been scanned for viruses and
>> dangerous content by MailScanner, and is
>> believed to be clean.
>
> Murat BEYHAN Jeofizik Y.Müh. T.C. Başbakanlık Afet ve Acil Durum
> Yönetimi Başkanlığı Deprem Dairesi Başkanlığı Eskişehir Yolu 12. Km.
> Lodumlu/ANKARA Tel: 312 2872680-1550 email:beyhan at deprem.gov.tr
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>
> <relief.jpeg><hillshade2.jpeg><hillshade1.jpeg><slope.jpeg>
Tyler Mitchell
Engineering Director
Actian Corporation
tyler.mitchell at actian.com
MOBILE 250-303-1831
SKYPE spatialguru
www.actian.com
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