[Qgis-user] Convrting vector to raster: rasterize (vecor to raster ) in QGIS

[Manuel Spínola]

Thank you very much Santiago.

I still have unreasonables min and max numbers (-32768 - 32767)

I cannot reproduce the raster that I got with R.

Best,

Manuel


2013/3/22 Santiago Banchero <santiagobanchero at gmail.com>

> I attach a picture so you can understand better and the parameters that
> you would see.
> Best
> Santiago
>
> Usage: gdal_rasterize [-b band]* [-i] [-at]
>        [-burn value]* | [-a attribute_name] [-3d]
>        [-l layername]* [-where expression] [-sql select_statement]
>        [-of format] [-a_srs srs_def] [-co "NAME=VALUE"]*
>        [-a_nodata value] [-init value]*
>        [-te xmin ymin xmax ymax] [-tr xres yres] [-tap] [-ts width height]
>       * [-ot {Byte/Int16/UInt16/UInt32/Int32/Float32/Float64/*
> *             CInt16/CInt32/CFloat32/CFloat64}]* [-q]
>        <src_datasource> <dst_filename>
>
>
> 2013/3/22 Manuel Spínola <mspinola10 at gmail.com>
>
>> Thank you very much Santiago,
>>
>> I don´t understand your suggestion. Could you be more specific.
>>
>> Best,
>>
>> Manuel
>>
>>
>> 2013/3/22 Santiago Banchero <santiagobanchero at gmail.com>
>>
>>> Hi,
>>>    you need fix the *-ot* parameter manually and set a Data Type
>>> according to your trouble.
>>>
>>> Regards
>>> Santiago
>>>
>>>
>>> 2013/3/22 Manuel Spínola <mspinola10 at gmail.com>
>>>
>>>>  Dear list members,
>>>>
>>>> I am trying to convert a vector (shapefile) to a raster using the
>>>> option Conversion -> rasterize under the raster menu, however I don´t
>>>> understand the result that I am getting. The values of the raster does not
>>>> make any sense the min: -1.79769e+308 and max: 1.79769e+308
>>>>
>>>>
>>>> I am also doing the same thing in R and I got reasonable results, the
>>>> values of the raster goes from 1 to 10, the ones that I expected.
>>>>
>>>> > raster_agri
>>>> class       : RasterLayer
>>>> dimensions  : 300, 300, 90000  (nrow, ncol, ncell)
>>>> resolution  : 207.5064, 133.2117  (x, y)
>>>> extent      : 440239.3, 502491.2, 1032331, 1072294  (xmin, xmax, ymin,
>>>> ymax)
>>>> coord. ref. : +proj=tmerc +lat_0=0 +lon_0=-84 +k=0.9999 +x_0=500000
>>>> +y_0=0 +ellps=WGS84 +units=m +no_defs
>>>> data source : in memory
>>>> names       : layer
>>>> values      : 1, 10  (min, max)
>>>>
>>>>
>>>>
>>>> And even when I import this to QGIS the values of the raster does not
>>>> make any sense either min: -2.14748e+09 and max: 2.14748e+09
>>>>
>>>> Any clue on this.
>>>>
>>>> Best,
>>>>
>>>> Manuel
>>>>
>>>> --
>>>> *Manuel Spínola, Ph.D.*
>>>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>>>> Universidad Nacional
>>>> Apartado 1350-3000
>>>> Heredia
>>>> COSTA RICA
>>>> mspinola at una.ac.cr
>>>> mspinola10 at gmail.com
>>>> Teléfono: (506) 2277-3598
>>>> Fax: (506) 2237-7036
>>>> Personal website: Lobito de río<https://sites.google.com/site/lobitoderio/>
>>>> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>>>>
>>>> _______________________________________________
>>>> Qgis-user mailing list
>>>> Qgis-user at lists.osgeo.org
>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>
>>>>
>>>
>>>
>>> --
>>> Santiago Banchero
>>>
>>>
>>
>>
>> --
>> *Manuel Spínola, Ph.D.*
>> Instituto Internacional en Conservación y Manejo de Vida Silvestre
>> Universidad Nacional
>> Apartado 1350-3000
>> Heredia
>> COSTA RICA
>> mspinola at una.ac.cr
>> mspinola10 at gmail.com
>> Teléfono: (506) 2277-3598
>> Fax: (506) 2237-7036
>> Personal website: Lobito de río<https://sites.google.com/site/lobitoderio/>
>> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
>>
>
>
>
> --
> Santiago Banchero
>
>


-- 
*Manuel Spínola, Ph.D.*
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola at una.ac.cr
mspinola10 at gmail.com
Teléfono: (506) 2277-3598
Fax: (506) 2237-7036
Personal website: Lobito de río <https://sites.google.com/site/lobitoderio/>
Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/>
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