[gdal-dev] gdal_merge / negative size

2010-11-01 Thread Ghislain Picard
Hi All, I have an image having y-coordinate increasing in the downward direction. To display the image, the pixel size is -1000 on the y-axis (see ENVI header file below). This works perfectly except in gdal_merge when use to clip the raster (using QGis GdalTools(s plugin for instance). For

Re: [gdal-dev] RFC 32 - gdallocationinfo utility

2010-11-01 Thread Frank Warmerdam
Eli Adam wrote: Frank, This is a helpful new utility. I read the documentation and tried it out. Using gdallocationinfo to find the elevation at a given lat/long location seems like a reasonable use. It may be desirable to input and output an ogr layer rather than a single point. For

Re: [gdal-dev] RFC 32 - gdallocationinfo utility

2010-11-01 Thread Eli Adam
Frank, This is a helpful new utility. I read the documentation and tried it out. Using gdallocationinfo to find the elevation at a given lat/long location seems like a reasonable use. It may be desirable to input and output an ogr layer rather than a single point. For instance, what

[gdal-dev] DXF Writer and labels: encoding, angle and anchor position?

2010-11-01 Thread Andreas Neumann
Hi, Again some question on the dxf-writer, now with regards to labels: * some of my special characters don't display correctly, e.g. the Unicode 2030 sign (german Promille sign) doesn't display (neither in the FME viewer nor in Autocad Design Review) - some other "strange characters" are displaye

[gdal-dev] Problems with ogr2ogr and datum conversions

2010-11-01 Thread Anders Moe
Hi everyone My problem in general is that I can't seem to get datum conversions to work in OGR. I do something like ogr2ogr.exe -f "ESR Shapefile" -t_srs WGS84 target.shp fields_dd.shp The source SRS is latlon/ED50. I have compiled proj4 with nadshift , I have all the datum shitft grid file

[gdal-dev] dxf writer: specifying dash patterns with ogr-feature styles

2010-11-01 Thread Andreas Neumann
Hi again, Another problem with the DXF writer: I am trying to specify a dash-patterns for lwpolylines by using the following OGR feature styling: PEN(c:#FF,p:"2g,1g") - the pattern is defined in ground units, the ground units in the data sets are set in meters. In the resulting dxf I can se

[gdal-dev] DXF writing and layers

2010-11-01 Thread Andreas Neumann
Hi, I am further testing the enhanced DXF reader/writer. While testing the writer I wanted to use the new feature of specifying a column in the source dataset that contains the layer name a feature should end up in the destination dxf file. My source is a Postgis table, and the layer name is sto