[Qgis-user] Vector to Raster Conversion, was :[Euclidean Distance grid creation problem]

[Alex Mandel]

Ok, now we're getting somewhere. There error is specifically with the 
GDAL rasterize tool (has no direct link to a euclidean distance tool).

Can you please post the GDAL command from the bottom box of that tool?

Thanks,
Alex

On 06/04/2013 01:14 PM, Falk Huettmann wrote:
> thanks, re. Euclidean Distance problem,
>
> we use the following point layer (shapefile attached) and with the GDAL
> plugin.
>
> We click on Raster, Rasterize (but get a grey canvas; all values in the
> legend show the same. Using line data has the same effect).
> We cannot proceed from that.
>
>  From there we wanted to get a Euclidean Distance and using Raster, Analyse,
> Distance.
>
> We got stuck in this for over 3 weeks now (paper on Open Source GIS) and
> wonder how to proceed next and for good
> progress.
>
> Thanks so much for any insights.
>
> Very best from Alaska
>     F.
>
>
>
>
>
> On Mon, Jun 3, 2013 at 9:21 PM, Alex Mandel <tech_dev at wildintellect.com>wrote:
>
>> On 06/03/2013 10:02 PM, Falk Huettmann wrote:
>>
>>> Dear all,
>>>
>>> greetings;
>>> we are still stuck with creating a Euclidean Distance grid in QGIS
>>> based on point data (shapefile, projected in lat lon and with an ID of 1).
>>>
>>> I am aware of the steps shown online, but these create us just a grey
>>> canvas.
>>> (we tried different pixel and extent settings too)
>>>
>>> We are grateful for  any input (if not resolved, we will probably move to
>>> R
>>> then and other options).
>>>
>>> Thanks indeed for any input; more later
>>>        Falk Huettmann
>>>
>>>
>>>
>> Grey pixels do not mean no data. Did you check the values of random pixels
>> with the Info tool?
>>
>> Normally in the raster properties you have ask QGIS to calculate the range
>> of values, and stretch min/max in order to actually see what you expect, or
>> put in a custom color ramp.
>>
>> Also what tutorial did you follow and which tool did you use to calculate
>> the distance grid.
>>
>> Thanks,
>> Alex
>>
>>
>