Need help with TIF TILE SIZE

[Yar Doroshenko]

Brent,

Thank you.

Would you happen to have a sample syntax for the mosaicking feature of
gdalwarp?


Yar



On Thu, 7 Jul 2005 08:21:28 -0600, Brent Fraser <bfraser at GEOANALYTIC.COM>
wrote:

>Yar,
>
>  The effect you are seeing may be due to re-projecting the UTM tifs to
>geographic (latlong).  This results in having a set of nodata (usually
>black) pixels around the perimeter of the new tif file.  One solution is to
>use the mosaicking feature of gdalwarp to add in the surrounding UTM images
>it fill in the gaps.
>
>Brent Fraser
>
>
>----- Original Message -----
>From: "Yar Doroshenko" <numerous at GMAIL.COM>
>To: <MAPSERVER-USERS at LISTS.UMN.EDU>
>Sent: Wednesday, July 06, 2005 9:08 PM
>Subject: [UMN_MAPSERVER-USERS] Need help with TIF TILE SIZE
>
>
>> Hi Guys,
>>
>> Would anyone be able to answer this one, I'm posting it second time:
>>
>> My tileindex works fine, I have 51 tig images, I define my layer as the
>> folowing:
>>
>> layer
>> name "aerial"
>> tileindex mrsid/img_index
>> type raster
>> status default
>> end
>>
>> My tif images display just fine, the top left corner seems to be
>positioned
>> correctly. The problem is that at a certain zoom level, there are spaces
>> between my tiles and I would like them to overlap. I know that my tifs
are
>> fine, when I open them in a viewer I can zoom in deep. Is there any way
to
>> make tifs larger, or make them overlap at a certain zoom level?
>>
>> Also, here is what I used before I implemented gdaltindex:
>>
>> I used mrsiddecode to convert my MrSID images to Tif
>>
>> mrsiddecode -i input.sid -o output.tif -s 2
>>
>> This way I got my tif to be around 100Mb instead of 2Gb with
>gdal_translate
>>
>> next I did gdalwarp to convert my coordinates
>>
>> C:\ITS\GDAL\125\bin>gdalwarp -s_srs "+proj=utm +zone=15 +datum=NAD83" -
>> t_srs "+p
>> roj=latlong +datum=WGS84" 10_1_1.tif latlong.tif
>> :0...10...20...30...40...50...60...70...80...90...100 - done.
>>
>>
>> Could anyone see a potential explanation to my tile problem?
>>
>> Thank you,
>>
>>
>> Yar