[gdal-dev] Question regarding Shapefile Geo-cordinates

Fri May 26 01:52:06 PDT 2023

Hi Haddad/Rob;

I tried conversion of DWG to DXF and then ran command; but I am getting
errors I have mentioned in the shared document(on Drive); I have shared the
DXF file too.

>From the python terminal; get Size too big issue And from command line get
polygon errors.

Regds-
Vijay

On Fri, May 26, 2023 at 2:05 AM TC Haddad <tchaddad at gmail.com> wrote:

>
> Hi Vijay,
>
> in his earlier email Rob said that before he ran the command, he used the
> website you provided to convert the file format from " dwg to dxf "
>
> I think if you can export from CAD to DXF, then you can skip using the
> website. But if you are starting from DWG, then first convert it to DXF
> before trying the OGR commands.
>
> Tanya
>
> On Thu, May 25, 2023 at 6:19 AM Vijay Kurhade <vijay.kurhade at gmail.com>
> wrote:
>
>> Hi Rob;
>>
>> Sorry to bother you again.
>>
>> Getting shapefile size as well as other DWG-DXF conversion issues.
>>
>> please refer to Doc shared on Drive : *Doc for Rob : Gdal Steps.docx*
>> *https://docs.google.com/document/d/16IUBzzaJZ0baCdtUsUCgTHBBE3-D-wy_/edit?usp=share_link&ouid=105159133680993726163&rtpof=true&sd=true
>> <https://docs.google.com/document/d/16IUBzzaJZ0baCdtUsUCgTHBBE3-D-wy_/edit?usp=share_link&ouid=105159133680993726163&rtpof=true&sd=true>*
>>
>> Also;
>> In case you think it is possible for you to share your working Output
>> shapefile; which I can use till I get the size issue fixed at my end.
>>
>> With Regards-
>> Vijay
>>
>> On Sat, May 13, 2023 at 12:24 AM Robert Hewlett <rob.hewy at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> Sorry for the late reply, Still marking and meetings on this side of the
>>> globe:
>>>
>>> I used the site to go from dwg to dxf.
>>>
>>> Then used ogr2ogr at the command line
>>>
>>> ogr2ogr --version
>>> GDAL 3.6.4, released 2023/04/17
>>>
>>> ogr2ogr -a_srs "EPSG:4326" -f "ESRI Shapefile" ^
>>> -gcp 12.8973 4.8524 73.7737714009421 18.546875366193724 ^
>>> -gcp 8.75204 17.21844 73.76355401367982 18.57499038261755 ^
>>> -gcp 23.7272 8.4155 73.79942967064645 18.55509638758041 ^
>>> -gcp 14.3373 21.9502 73.7767221307843 18.58772458615475 ^
>>> -skipfailures ^
>>> shp_out geocoordinated_Pune_baner_Map.dxf
>>>
>>> The gcps need work and I am not familiar with the area. Feels like some
>>> new bridges and roads.
>>>
>>> I got closer
>>> https://i.imgur.com/PhaXlrE.png
>>>
>>> -gcp 12.8973 4.8524 18.546875366193724 73.7737714009421 #Pashan HWY Sus
>>> Ln
>>> -gpc 8.75204 17.21844 18.57499038261755 73.76355401367982 # Hwy 48 and
>>> Balewadi
>>> -gpc 23.7272 8.4155 18.55509638758041 73.79942967064645 # Baner
>>> Prathamesh Park RD
>>> -gpc 14.3373 21.9502 18.58772458615475 73.77672213078434 # Balewadi
>>> wakad bridge
>>>
>>> On Wed, May 10, 2023 at 11:54 PM Vijay Kurhade <vijay.kurhade at gmail.com>
>>> wrote:
>>>
>>>> Hello
>>>>
>>>> I am sharing a shape file and AutoCAD (.dwg) file. I have
>>>> geo-coordinated the CAD file and then converted it into .shp file using
>>>> following steps:
>>>> 1)      Selected ‘geographic location’ option in AutoCAD
>>>>
>>>> 2)      Entered latitude (18.5652) and longitude (73.7888) and
>>>> elevation (606 meters)
>>>>
>>>> 3)      Selected ‘GIS coordinate system’ as ‘WORLD-MERCATOR(WGS84)
>>>>
>>>> 4)      Selected time zone as ‘GMT+5:30 Chennai, Kolkata, Mumbai, New
>>>> Delhi’
>>>>
>>>> 5)      Drawing unit ‘Inches’
>>>>
>>>> 6)      Selected geo-graphic location in the AutoCAD drawing
>>>>
>>>> 7)      Specified the north direction angle. Repeated the above steps
>>>> to mark three more geographic locations in the CAD file
>>>>
>>>> 8)      Saved the CAD file and converted it into shape file using
>>>> online tool ‘https://mygeodata.cloud/conversion’
>>>>
>>>>
>>>> Link to files :
>>>> https://drive.google.com/drive/folders/1xylPKQy0uJM3zbcqyxdvdSnxCaFh8lox?usp=share_link
>>>>
>>>>
>>>> I hope this helps you in analyzing the issue.
>>>>
>>>> Thanks in Advance.
>>>>
>>>> Regards-
>>>> Vijay
>>>>
>>>> Hewlett <rob.hewy at gmail.com> wrote:
>>>>
>>>>> It sounds like the lat and longs are being plotted as Web Mercator
>>>>>> meters. I could be wrong
>>>>>>
>>>>>>
>>>>>> Is there a .PRJ file?
>>>>>>
>>>>>> How are you viewing the data:
>>>>>> QGIS
>>>>>> Open layers
>>>>>> Leaflet
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Tue, May 9, 2023, 04:55 Vijay Kurhade <vijay.kurhade at gmail.com>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi;
>>>>>>>
>>>>>>> I have a long pending issue with Shapefile and using proper
>>>>>>> Geo-coordinates for it;
>>>>>>> i need to place it in Pune, India with actual 4 Geo-Coordinates but
>>>>>>> everytime My shapefile gets placed into earth's center mostly Africa.
>>>>>>>
>>>>>>> What is the solution; How can I ensure the shapefile uses those
>>>>>>> lat/long 4 coordinates and is placed on Pune, India in Map rather than
>>>>>>> somewhere else?
>>>>>>>
>>>>>>> Thanks in Advance.
>>>>>>>
>>>>>>> Regards-
>>>>>>> Vijay
>>>>>>> _______________________________________________
>>>>>>> gdal-dev mailing list
>>>>>>> gdal-dev at lists.osgeo.org
>>>>>>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>>>
>>>>>> _______________________________________________
>>>>>> gdal-dev mailing list
>>>>>> gdal-dev at lists.osgeo.org
>>>>>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>>>
>>>>> _______________________________________________
>>>> gdal-dev mailing list
>>>> gdal-dev at lists.osgeo.org
>>>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>>
>>> _______________________________________________
>>> gdal-dev mailing list
>>> gdal-dev at lists.osgeo.org
>>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/gdal-dev/attachments/20230526/284c6c28/attachment-0001.htm>