--- title: "Settings | Guides | Map tiling hosting | Data processing" description: "Comprehensive guide to global and advanced task settings in MapTiler Engine." --- # MapTiler Engine settings In MapTiler Engine, you can review and adjust the [global settings](#global-settings) that store various default configurations. In addition to that, you have the possibility to modify certain settings only for a specific tiling task in [advanced task settings](#advanced-task-settings), which overrides the global defaults. ## Global settings To access global settings, go to **File > Settings**. These settings are saved permanently and applied to any processing task by default, unless modified in [advanced task settings](#advanced-task-settings). ![global\_settings.png](./global_settings.png) ### Image tab **Resampling** and **overviews resampling** _Can be overriden with [advanced task settings](#advanced-task-settings)_ First of all, you can see the combo boxes controlling the resampling methods that are being used. You will probably be interested in these either when over-zooming your data or when experimenting with the options to find out which setting will result in the best output for you. For detailed information go to [Resampling tiles](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/resampling-tiles/). These options are available from MapTiler Engine Plus. The default value for resampling is **bilinear** and for overviews resampling **average.** **Tiling scheme** _Can be overriden with [advanced task settings](#advanced-task-settings)_ Different map providers work with different tiling schemes, so make sure you are using the correct scheme depending on further usage of your output. The schemes differ in the way your output tiles are named. For detailed information on the available options, go to [Tiling scheme](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/tiling-scheme-in-folder-output/). The Default value is **XYZ.** **Sparse output** _Can be overriden with [advanced task settings](#advanced-task-settings)_ This option controls how the **empty tiles** in your output are treated. In some cases, e.g. when your input data are very geographically distant, you’ll get a huge amount of empty tiles between them, which can lead to high disk space usage. If you leave the **default** setting, the blank tiles will be produced for _MBTiles_ and _GeoPackage_ outputs otherwise will be skipped. By setting this option to **sparse** (skip empty tiles) or **no-sparse** (don’t skip), you have full control over this. The default value is “**default”** (depending on the used store option). **ECW memory usage** This option allows you to set the maximum amount of memory to be used for in-memory caching by the **ECW driver** of the GDAL library. This setting should be used with care and in reasonable cases, since using a high value may slow your system down or make it temporarily irresponsive. The default and suggested value for ECW Memory usage is **80%.** **Allow large JPEG** Enabling **large JPEG** allows you to process very large images. It also should be used only in reasonable cases since it can have the same negative impact on your system as a large ECW memory usage. By default, large JPEG support is **disabled.** ### General tab **Proxy settings** If you use a computer without direct access to the internet, enable the system proxy to load the proxy settings from your system configuration. **Saved georeferences** By leaving this option enabled, you will be offered to use the geolocation previously saved by [Assign visually](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/georeferencing/) when you add a new input file. By default, saving georeferences is **enabled.** **MBTiles compatibility** _Can be overriden with [advanced task settings](#advanced-task-settings)_ Enabling this option make the generated _GeoPackage_ conform to the _MBTiles_ specification for the tiles table. The tilegrid is in the selected output coordinate system, which is not defined for _MBTiles_. By default, MBTiles compatibility is **disabled.** **Save EPSG code** _Can be overriden with [advanced task settings](#advanced-task-settings)_ ![wkt-save-epsg.png](./4414014344209_e75a06f1b6.png) Changes the format of coordinate system representation to be used. Disabling this option causes saving the full WKT string (left) instead of the short EPSG code (right) within the project file or report message. [EPSG.io](https://epsg.io/) is a nice tool to switch between different formats. For the lower versions of the application, this option is hidden and set to true. Changing this option is enabled in MapTiler Engine Pro. By default, saving EPSG code instead of WKT string is **enabled.** **Google Maps API key** Use this field to save your Google Maps API key, which is used to secure Google Maps Platform products from unauthorized use. You can get this key by following steps described in the [Google guides](https://developers.google.com/maps/documentation/javascript/get-api-key#create-api-keys). For more details, go to [Google maps API key](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/google-maps-api-key/). ### Directories tab This tab defines local directories that MapTiler Engine uses. These are the default locations: - `C:\Windows\Temp` to store working and temporary files (`/tmp` on Linux and Mac) - `C:\Users\\Pictures` to look for input files - `C:\Users\\Desktop` to save output files and finished tasks (.mtp files) Note that these locations (except Temp) are only used as a starting point, meaning that you’ll be still able to browse for a different directory each time you open or save a file. However, setting a custom location can be faster and more convenient. To set a custom location, check the respective box and select your preferred directory. _Setting custom directories is only available in MapTiler Engine Plus and above._ **Save the last selected directory for user directories** With this option enabled, when you select a different path (in the application), it will get saved to settings in the background. This option is available from MapTiler Engine Plus. Let’s say you have set the Engine_/_ location for adding a file, but you add a file from Engine_/files-to-process/_ folder, this folder gets saved in settings for you and replaces the Engine_/_ folder just as you would have done it in settings. The next time you add a file, the file dialog will navigate in Engine_/files-to-process/_. This works only for paths that have been set **custom**! **Remember the last selected directory in the application’s lifetime** With this option enabled, when you select a different path (in the application), it will be remembered (but not saved) until you restart the application. This option is available from MapTiler Engine Plus. Let’s say you did not touch the “add a file” path (set to _Pictures/_), but you add a file from Engine_/files-to-process/_ folder, you’ll be offered this path every time you attempt to add a file until you change it in the settings, open a file from a different location, or quit the application. After the application restarts, the file dialog will navigate in the default location (_Pictures/_) again. ### Watermark tab MapTiler Engine allows you to set the custom watermark to be used in your outptut. You can choose either **image** (which will need to meet some criteria for this purpose), or quickly create a **text watermark** using the simple in-build editor. Either way, you’ll see the result in the preview below. Read the [Custom watermark](https://docs.maptiler.com/guides/map-tilling-hosting/data-processing/custom-watermark/) article for more detailed description. This option is available in MapTiler Engine Pro and by default, the “No watermark” option is set. Saved watermark settings (both image and text) last through the application lifetime and get loaded on the next startup. ## Advanced task settings To access advanced task settings, start configuring a tiling task. When you get to the output settings, use the **Advanced settings** button. Any changes in these settings will only apply to this specific task, and won’t be propagated to the global settings. If you [save your task](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/intelligent-workflows/#cancel-a-running-task-and-save-it), the advanced settings specific for the task will be saved too. ![advanced\_task\_settings\_open.png](./advanced_task_settings_open.png) Advanced task settings contain the same options as the [Image](#image-tab) and [General](#general-tab) tabs in global settings. If you update these options in the advanced task settings, they’ll override the global settings, but only for that one task. Additionally, you can configure the **HiDPI / Retina** scaling in the advanced task settings dialog. To learn more about this option, go to [Custom retina scale](https://docs.maptiler.com/guides/map-tiling-hosting/data-processing/custom-retina-scale/).