# Can mapwingis preprocess large images into tiles or caches?

**URL:** <https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218>\
**Category:** MapWinGIS\
**Created:** [July 28, 2019, 11:37am UTC](https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218 "2019-07-28T11:37:02Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![zcw](https://avatars.discourse-cdn.com/v4/letter/z/c4cdca/32.png) [@zcw](https://mapwindow.discourse.group/u/zcw)\
**Post date:** [July 28, 2019, 11:37am UTC](https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218/1 "2019-07-28T11:37:02Z")

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I have a 2 gb satellite image, mapwingis is very slow when loading , can it be preprocessed to tile or cache by mapwingis？

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**Author:** ![pmeems](https://yyz2.discourse-cdn.com/free1/user_avatar/mapwindow.discourse.group/pmeems/32/9_2.png) [@pmeems](https://mapwindow.discourse.group/u/pmeems)\
**Post date:** [August 2, 2019, 12:15pm UTC](https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218/2 "2019-08-02T12:15:49Z")

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Does the file have overviews? Loading the data with overviews should speed up the loading time.

[GDALAddOverviews()](https://www.mapwindow.org/documentation/mapwingis4.9/class_utils.html#ac7352d6853354c6995c95e9c60804f77)

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**Author:** ![zcw](https://avatars.discourse-cdn.com/v4/letter/z/c4cdca/32.png) [@zcw](https://mapwindow.discourse.group/u/zcw)\
**Post date:** [August 9, 2019, 3:06am UTC](https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218/3 "2019-08-09T03:06:48Z")

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The operation will be slow When the map is larger than 1G. I want to generate map tiles to speed up.

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**Author:** ![pmeems](https://yyz2.discourse-cdn.com/free1/user_avatar/mapwindow.discourse.group/pmeems/32/9_2.png) [@pmeems](https://mapwindow.discourse.group/u/pmeems)\
**Post date:** [January 5, 2022, 3:08pm UTC](https://mapwindow.discourse.group/t/can-mapwingis-preprocess-large-images-into-tiles-or-caches/218/4 "2022-01-05T15:08:51Z")

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