Re: [udig-users] resolution lost on DRG

[Don <harterc1@xxxxxxxxxxx>]

I forgot to mention that if I choose a scale to small only part of the
DRG map is printed.  I guess that is limited by the height and width
that I specified.  I used the same width and length as the original DRG
file.
Don wrote:
> I am able to increase the resolution by decreasing the scale.  It also
> decreases the size of my font so that is not visible in some cases.  I
> am wondering if there is some formula that I could apply given the
> raster size and scale to choose the right scale.
>
> Image Width: 5589 Image Length: 6932
> Resolution: 250, 250 pixels/inch
>
>
> Is there a way to use one layers extents to "filter out" another layers
> data that is outside that extent?
> I am getting points plotted outside the extent of the DRG topo map.
>
> I see a field for a filter but I have found no documentation on it.  
>
> andrea antonello wrote:
>   
>> Hi Don,
>>
>>   
>>     
>>> I have a DRG topo map.  I added it as a raster layer.  I then added a
>>> postgis layer which plotted points and added labels.  I then exported
>>> the resulting map to another tiff file.  When I view it and zoom in I
>>> seem to have lost the resolution that the original tiff file had.  How
>>> do I fix this?
>>>     
>>>       
>> If you exported the map with the export enigine I think by default the
>> map is exported at screenshot resolution.
>> I think, but am not sure right now, that Jesse added also the
>> possibility to set the scale. If that is the case, by changing the
>> scale you should be able to gain higher resolution.
>>
>> Andrea
>>
>>
>>   
>>     
>>> Here is information on the original tiff file:
>>> TIFFReadDirectory: Warning, O34086H1.TIF: unknown field with tag 33918
>>> (0x847e) encountered.
>>> TIFF Directory at offset 0xdf40 (57152)
>>>  Subfile Type: (0 = 0x0)
>>>  Image Width: 5589 Image Length: 6932
>>>  Resolution: 250, 250 pixels/inch
>>>  Bits/Sample: 8
>>>  Compression Scheme: PackBits
>>>  Photometric Interpretation: palette color (RGB from colormap)
>>>  Samples/Pixel: 1
>>>  Rows/Strip: 1
>>>  Planar Configuration: single image plane
>>>  Color Map: (present)
>>>
>>> It is 7.5" (1/24000) topo map.
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>>>
>>>     
>>>       
>>   
>>     
>
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