[QGIS-Developer] 回复: How does QGIS parses the shapefile so quickly

[余 绍健]

Thanks
________________________________
发件人: Werner Macho <werner.macho at gmail.com>
发送时间: 2023年3月27日 23:18
收件人: Even Rouault <even.rouault at spatialys.com>
抄送: Alessandro Pasotti <apasotti at gmail.com>; 余 绍健 <shaojian.yu at hotmail.com>; qgis-developer at lists.osgeo.org <qgis-developer at lists.osgeo.org>
主题: Re: [QGIS-Developer] How does QGIS parses the shapefile so quickly

Hi!
Just to add some side information regarding Shapefiles:
(ignore it if understanding shapefiles ist a must in your case)

http://switchfromshapefile.org/

;)
regards
Werner

On Mon, Mar 27, 2023 at 5:16 PM Even Rouault via QGIS-Developer <qgis-developer at lists.osgeo.org<mailto:qgis-developer at lists.osgeo.org>> wrote:

Le 27/03/2023 à 10:06, Alessandro Pasotti via QGIS-Developer a écrit :
> Hi,
>
> QGIS is using the GDAL/OGR library to read the shapefiles.
which uses shapelib
>
> On Mon, Mar 27, 2023 at 9:51 AM 余 绍健 via QGIS-Developer
> <qgis-developer at lists.osgeo.org<mailto:qgis-developer at lists.osgeo.org>> wrote:
>> Dear All,
>>    Sorry to interrupt, I'm newer to QGIS, whe I use QIGS, I find that it is so quick for QGIS to parse shapefile even it is a very big file, I try to decode the file by my own with shapelib library, but the result is disappointed, I try to learn it by myself with QGIS source code but failed, so anyone can help point the entry of  decoding process?
>>
>> Thanks.
>> _______________________________________________
>> QGIS-Developer mailing list
>> QGIS-Developer at lists.osgeo.org<mailto:QGIS-Developer at lists.osgeo.org>
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>
>
--
http://www.spatialys.com
My software is free, but my time generally not.

_______________________________________________
QGIS-Developer mailing list
QGIS-Developer at lists.osgeo.org<mailto:QGIS-Developer at lists.osgeo.org>
List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20230328/63f94602/attachment.htm>