Re: [gdal-dev] Vector Tile Service
rmaddu,
VRT is raster format and MVT is vector format, so they are incompatible
without raster to vector transformation. So, I think there's something
missing from your problem statement.
Best,
Ari
rmaddu . kirjoitti 12.5.2020 klo 8.14:
I need some help on usage of GDAL C# bindings to convert VRT to MVT.
How do I know that, below call is complete? We observed that below
call is Async (All the code lines are executed and Parent thread is
waiting until the MVT files/folders are created in disk). Is this
correct?
I want to create a Vector Tile Service. My goal is to return the tile
to client once the tiles are generated. For this, whether the call is
completed or not? Below is the code, written in console app.
var options = new[]
{
"-f", "MVT",
"-dsco", "TILE_EXTENSION=pbf",
"-dsco", "MINZOOM=0",
"-dsco", "MAXZOOM=10",
};
string input = @"C:\Temp\vrtfile.vrt";
string output = @"C:\Temp\myMVTtiles";
using (
Dataset ds = Gdal.OpenEx(input, 4, null, null, null))
{
var newDs = Gdal.wrapper_GDALVectorTranslateDestName (output, ds,
gdalOptions, new Gdal.GDALProgressFuncDelegate(ProgressFunc), null);
newDs.FlushCache();
}
}
Regards,
Rajesh
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Re: [gdal-dev] Vector Tile Service
Hi, We have "VRT - Virtual format" for Vectors also (https://gdal.org/drivers/vector/vrt.html). Using this format and with C# bindings, presently I am able to generate the vector tiles in disk. My problem here is - Presently I have written code in console, whenever I open this console application and after few seconds tiles are generated in disk and console window is closed. Manually I am waiting till the console close and checking for my required tile. My server side requirement is, we will get multiple tile requests from client. We have to write mutiple calls "Gdal.wrapper_GDALVectorTranslateDestName" at a time. Question here is how to track these threads. How do I know, particular thread is completed so that I will check for a tile and return to client. Please provide the suggestions. Regards, Rajesh -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Vector Tile Service
I don't know about C#. In JavaScript I have a use case where I combine several single theme vector tiles into one multi theme tile each in its own thread async and then combine them before sending. I use the async.series method for that. Ari rmaddu kirjoitti 12.5.2020 klo 13.28: Hi, We have "VRT - Virtual format" for Vectors also (https://gdal.org/drivers/vector/vrt.html). Using this format and with C# bindings, presently I am able to generate the vector tiles in disk. My problem here is - Presently I have written code in console, whenever I open this console application and after few seconds tiles are generated in disk and console window is closed. Manually I am waiting till the console close and checking for my required tile. My server side requirement is, we will get multiple tile requests from client. We have to write mutiple calls "Gdal.wrapper_GDALVectorTranslateDestName" at a time. Question here is how to track these threads. How do I know, particular thread is completed so that I will check for a tile and return to client. Please provide the suggestions. Regards, Rajesh -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Vector Tile Service
Hi, Are you using GDAL binaries for vector tiles generation? Can you please share the sample code? Regards, Rajesh -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Vector Tile Service
Sorry, no. I'm using PostGIS via tilestrata-postgismvt. The code that combines the single-theme tiles it makes is mine, though. The tilestrata-postgismvt works under tilestrata, which works under express. Ari rmaddu kirjoitti 12.5.2020 klo 14.33: Hi, Are you using GDAL binaries for vector tiles generation? Can you please share the sample code? Regards, Rajesh -- Sent from: http://osgeo-org.1560.x6.nabble.com/GDAL-Dev-f3742093.html ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Results of gdalwarp from UTM32 to EPSG:4326 are not aligned?
Hello, I've a Sentinel 2 UTM32 scene (JPEG2000 format). What I want to do is: + Warp this scene from UTM32 to EPSG:4326 by gdalwarp gdalwarp T32UQD_20200421T102021_TCI_60m.jp2 -t_srs EPSG:4326 full_warp.tif + Clip a small subset of this file by gdal_translate gdal_translate -projwin 798326.68347 5795956.80269 799609.577326 5794397.95642 T32UQD_20200421T102021_TCI_60m.jp2 crop.tif Then warp this small subset also from UTM32 to EPSG:4326 by gdalwarp: gdalwarp crop.tif -t_srs EPSG:4326 small_warp.tif -dstnodata 0 However, when I overlay the small_warp.tif on the full_warp.tif by QGIS 2.14.9, I see the small file is not aligned on the big one. Illustration: https://i.stack.imgur.com/U5Vql.png What can be the reason for it? More details given on this link: https://gis.stackexchange.com/questions/361410/results-of-gdalwarp-from-utm32-to-epsg4326-are-not-aligned Thanks, ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Removal of API_PROXY mechanism: objections?
On jeudi 7 mai 2020 20:53:15 CEST Even Rouault wrote: > Hi, > > https://github.com/OSGeo/gdal/pull/2489 kills the API_PROXY mechanism, > which removes 7820 lines of code. Anyone objects ? Hearing no objection, this PR has been merged Even -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Results of gdalwarp from UTM32 to EPSG:4326 are not aligned?
On mardi 12 mai 2020 16:19:43 CEST Pham Huu Bang wrote: > Hello, > > I've a Sentinel 2 UTM32 scene (JPEG2000 format). > > What I want to do is: > > + Warp this scene from UTM32 to EPSG:4326 by gdalwarp > gdalwarp T32UQD_20200421T102021_TCI_60m.jp2 -t_srs EPSG:4326 full_warp.tif > > + Clip a small subset of this file by gdal_translate > gdal_translate -projwin 798326.68347 5795956.80269 799609.577326 > 5794397.95642 T32UQD_20200421T102021_TCI_60m.jp2 crop.tif > > Then warp this small subset also from UTM32 to EPSG:4326 by gdalwarp: > > gdalwarp crop.tif -t_srs EPSG:4326 small_warp.tif -dstnodata 0 > > However, when I overlay the small_warp.tif on the full_warp.tif by > QGIS 2.14.9, I see the small file is not aligned on the big one. > > Illustration: https://i.stack.imgur.com/U5Vql.png > > What can be the reason for it? When you don't specify any target extent or resolution, gdalwarp guesses them from the input raster georeferencing and target SRS. It doesn't try to align on any particular resolution You may want to use the -tr and -tap switches to specify a target resolution, and constraint the extents to be aligned on it. Another reason for the misalignment is that you use the default nearest resampling. Using -r cubic could likely improve things To get perfectly overlapping images, you may also need to specify -et 0 Even -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Results of gdalwarp from UTM32 to EPSG:4326 are not aligned?
Thanks Even, I managed to make them aligned (illustration: https://i.imgur.com/1TwmVMN.png) from your valuable suggestion with these 2 commands (-tr are used same for both gdapwarp and -tap option is the critical): gdalwarp -tr 0.0007161230037719291 -0.0007161230037719291 T32UQD_20200421T102021_TCI_60m.jp2 full_warp.tif -t_srs EPSG:4326 -dstnodata 0 -tap gdalwarp -tr 0.0007161230037719291 -0.0007161230037719291 crop.tif small_warp.tif -t_srs EPSG:4326 -dstnodata 0 -tap On Tue, 12 May 2020 at 18:12, Even Rouault wrote: > On mardi 12 mai 2020 16:19:43 CEST Pham Huu Bang wrote: > > > Hello, > > > > > > I've a Sentinel 2 UTM32 scene (JPEG2000 format). > > > > > > What I want to do is: > > > > > > + Warp this scene from UTM32 to EPSG:4326 by gdalwarp > > > gdalwarp T32UQD_20200421T102021_TCI_60m.jp2 -t_srs EPSG:4326 > full_warp.tif > > > > > > + Clip a small subset of this file by gdal_translate > > > gdal_translate -projwin 798326.68347 5795956.80269 799609.577326 > > > 5794397.95642 T32UQD_20200421T102021_TCI_60m.jp2 crop.tif > > > > > > Then warp this small subset also from UTM32 to EPSG:4326 by gdalwarp: > > > > > > gdalwarp crop.tif -t_srs EPSG:4326 small_warp.tif -dstnodata 0 > > > > > > However, when I overlay the small_warp.tif on the full_warp.tif by > > > QGIS 2.14.9, I see the small file is not aligned on the big one. > > > > > > Illustration: https://i.stack.imgur.com/U5Vql.png > > > > > > What can be the reason for it? > > > > When you don't specify any target extent or resolution, gdalwarp guesses > them from the input raster georeferencing and target SRS. It doesn't try to > align on any particular resolution > > > > You may want to use the -tr and -tap switches to specify a target > resolution, and constraint the extents to be aligned on it. > > > > Another reason for the misalignment is that you use the default nearest > resampling. Using -r cubic could likely improve things > > > > To get perfectly overlapping images, you may also need to specify -et 0 > > > > Even > > > > -- > > Spatialys - Geospatial professional services > > http://www.spatialys.com > -- *Bang Pham Huu * *-* *Master of Science - Research Assistant at Field Monitoring Center - 4 F, E3 BuildingViet Nam - Ha Noi National University - University of Engineering and Technology* *Email: a09...@gmail.com - Tel: +84 164.6339.217* *“Life is like riding a bicycle. To keep your balance, you must keep moving.”― Albert Einstein* ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] Appending to a single feature class in a gdb via ogr2ogr
Hi Maggie,
On Mon, Apr 27, 2020 at 9:03 AM Maggie Wooten wrote:
>
> First, I apologize if I am using this mailing list improperly. This is my
> first time here.
Asking questions is an appropriate use of the list.
>
> I am trying to iterate over some shapefiles (109 shapefiles to be exact) and
> append them to a *single* feature class in an output geodatabase, but the
> resulting output geodatabase is one with 100 feature classes that looks like
> this:
>
Do all the shapefiles have (exactly) the same fields? If not, it
probably won't work.
> INFO: Open of `output.gdb' using driver `FileGDB' successful.
> 1: output (Multi Polygon)
> 2: output_1 (Multi Polygon)
> 3: output_1_2 (Multi Polygon)
> 4: output_1_2_3 (Multi Polygon)
> 5: output_1_2_3_4 (Multi Polygon)
> .
> 99:
> output_1_2_3_4_5_6_7_8_9_10_11_12_13_14_15_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_31_32_33_34_35_36_37_38_39_40_41_42_43_44_45_98
> (Multi Polygon)
> 100:
> output_1_2_3_4_5_6_7_8_9_10_11_12_13_14_15_16_17_18_19_20_21_22_23_24_25_26_27_28_29_30_31_32_33_34_35_36_37_38_39_40_41_42_43_44_45_99
> (Multi Polygon)
>
>
> These are the commands I'm running in the iteration:
>
> if i == 0: "ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -f
> "FileGDB" output.gdb input1.shp"
>
> else: "ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -update -append
> -f "FileGDB" output.gdb inputX.shp"
>
>
> What am I doing wrong here? How can I get the desired result? I tried a bunch
> of different things and flags and still could not get it all to append to one
> feature class. Any advice would be greatly appreciated and I'd be happy to
> provide whatever information may be necessary.
>
I'm not quite sure what is going wrong there. I didn't try with an
output of FileGDB but did something similar all with shapefiles. The
final resulting combined shapefile could probably be manually
ogr2ogr'ed into a FileGDB.
I did this on Ubuntu using Bash. If you're using a different shell,
you will need different command syntax. Specifically variables,
filenames without extensions, quoting, escape characters and other
things all need adjustment. Complicated filenames with spaces or
other symbols can make this more difficult too.
mkdir merged
This is to make an "empty" shapefile with the correct fields and types
and an additional field named s_file to put the source file name in
later:
ogr2ogr -sql "select *, '' as s_file from
Surveys_Invalid_ManualFix_7of7 where SURVEYID='fake'"
merged/surveys_v1.shp Surveys_Invalid_ManualFix_7of7.shp -nln
surveys_v1
This is to check that my empty shapefile turned out okay:
ogrinfo merged/surveys_v1.shp -al
(I worked in a directory where I was selecting ALL the shapefiles, all
of which have the same fields):
FILES=*.shp
for f in $FILES; do g=${f%%.*}; ogr2ogr -sql "select *, '$g' as s_file
from $g" -update -append merged/surveys_v1.shp $f -nln surveys_v1;
done
This is to check that my shapefile is no longer empty and turned out okay:
ogrinfo merged/surveys_v1.shp -al
If you are using DOS on windows, here is a note (untested) from some
previous work. I don't have windows readily available to test it (the
% might need to be %%):
for %f in (*.shp) do ogr2ogr -sql "select *, '%~nf' as s_file from
%~nf" -update -append merged\output.shp %f -nln output
Hope that helps.
Best regards, Eli
> Thank you!
> Ma
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Re: [gdal-dev] Appending to a single feature class in a gdb via ogr2ogr
On lundi 27 avril 2020 12:02:57 CEST Maggie Wooten wrote: > First, I apologize if I am using this mailing list improperly. This is my > first time here. > > I am trying to iterate over some shapefiles (109 shapefiles to be exact) > and append them to a *single* feature class in an output geodatabase, but > the resulting output geodatabase is one with 100 feature classes that looks > like this: > > INFO: Open of `output.gdb' using driver `FileGDB' successful. > 1: output (Multi Polygon) > 2: output_1 (Multi Polygon) > 3: output_1_2 (Multi Polygon) > 4: output_1_2_3 (Multi Polygon) > 5: output_1_2_3_4 (Multi Polygon) > . > 99: > output_1_2_3_4_5_6_7_8_9_10_11_12_13_14_15_16_17_18_19_20_21_22_23_24_25_26_ > 27_28_29_30_31_32_33_34_35_36_37_38_39_40_41_42_43_44_45_98 (Multi Polygon) > 100: > output_1_2_3_4_5_6_7_8_9_10_11_12_13_14_15_16_17_18_19_20_21_22_23_24_25_26_ > 27_28_29_30_31_32_33_34_35_36_37_38_39_40_41_42_43_44_45_99 (Multi Polygon) > > > These are the commands I'm running in the iteration: > > if i == 0: "ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -f > "FileGDB" output.gdb input1.shp" > > else: "ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -update > -append -f "FileGDB" output.gdb inputX.shp" > > > What am I doing wrong here? I'm not sure. I've just tried to replicate your issue with: ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -f "FileGDB" output.gdb poly1.shp ogr2ogr -nln output -a_srs EPSG:4326 -t_srs EPSG:4326 -update -append -f "FileGDB" output.gdb poly2.shp and I get a single 'output' layer in the GDB with the features of the 2 input layers concatenated. This is with GDAL 3.1/master and FileGDB SDK 1.5.1 Looking at the driver code, I can see a layer renaming strategy, but that shouldn't normally be triggered with the -update -output flag of ogr2ogr. And my understanding of that renaming strategy is that it should rather result in names like output, output_1, output_2, etc. -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] OAPIF and apikey
Hi, I wonder how I could deal with an OGC API Features service that requires to use apikey as an extra parameter in each request. First step is easy because I can just add the apikey parameter to the URL of the landing page (?api-key=xxxyyyzzzkkk) but the link to collections in the document that is returned comes without the apikey and ogrinfo and og2ogr are using the link as is. Result is a "HTTP 401 not authorized". OAPIF supports USERPWD and I found that various vsi systems have service specific configuration options https://gdal.org/user/virtual_file_systems.html. WFS driver https://gdal.org/drivers/vector/wfs.html supports UserPwd and COOKIE. WMS driver supports also UserPwd but I did not find any example of concatenating base URLs with extra parameters. I think that the WMS driver could also benefit from extra parameters which would be added to GetMaps because WMS servers support quite nice features with their own vendor options. -Jukka Rahkonen- ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] OAPIF and apikey
On mardi 12 mai 2020 21:21:30 CEST Rahkonen Jukka (MML) wrote: > Hi, > > I wonder how I could deal with an OGC API Features service that requires to > use apikey as an extra parameter in each request. First step is easy > because I can just add the apikey parameter to the URL of the landing page > (?api-key=xxxyyyzzzkkk) but the link to collections in the document that is > returned comes without the apikey and ogrinfo and og2ogr are using the link > as is. Result is a "HTTP 401 not authorized". Hum, normally there's code to handle that in the driver. And even a test (against a stub server). Are you using GDAL 3.1 / master ? If so, how can I replicate that ? -- Spatialys - Geospatial professional services http://www.spatialys.com ___ gdal-dev mailing list gdal-dev@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/gdal-dev
