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

[Barry Baram]

Please remove my email address. I incorrectly signed up for the wrong thing and not an expert in GIS anyways.

Thanks

On Mar 25, 2013, at 9:36 AM, Santiago Banchero <santiagobanchero at gmail.com> wrote:

> Hi, 
> 
> Have you reloaded the minimum and maximum values in the Style options?
> 
> I'm running a test with a point shapefile with values between 0 and 609 with this sentenses (in QGIS):
> 
> gdal_rasterize -init 0 -ot Int16 -of GTiff -co COMPRESS=DEFLATE -co ZLEVEL=9 -a prueba -l puntos -ts 500 500 -l puntos puntos.shp raster.tif
> 
> And check Information to raster (gdalinfo in QGIS)
> 
> Band 1 Block=500x8 Type=Int16, ColorInterp=Gray
>   Min=0.000 Max=609.000 
>   Minimum=0.000, Maximum=609.000, Mean=0.020, StdDev=1.618
>   Metadata:
>     STATISTICS_MAXIMUM=609
>     STATISTICS_MEAN=0.019832
>     STATISTICS_MINIMUM=0
>     STATISTICS_STDDEV=1.6183419576146
> 
> 
> My GDAL version's 1.9.2
> 
> 
> 
> 
> 
> 2013/3/23 Manuel Spínola <mspinola10 at gmail.com>
>> 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 
>>>>>> Institutional website: ICOMVIS
>>>>>> 
>>>>>> _______________________________________________
>>>>>> 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 
>>>> Institutional website: ICOMVIS
>>> 
>>> 
>>> 
>>> -- 
>>> 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 
>> Institutional website: ICOMVIS 
> 
> 
> 
> -- 
> Santiago Banchero
> 
> _______________________________________________
> Qgis-user mailing list
> Qgis-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/qgis-user
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-user/attachments/20130325/a84f19e4/attachment.html>