Qt Location Esri Plugin

Uses Esri for location services

Uses Esri for location services.

Overview

This geo services plugin allows applications to access Esri location based services using the Qt Location API. The use of these services is governed by the Esri terms of use.

Data is provided by many different content providers.

The Esri geoservices plugin can be loaded by using the plugin key “esri”.

You can use the services provided by Esri’s ArcGIS Platform by subscribing to the ArcGIS Developer Program, at no charge. See the “Essentials” plan details here: {https://developers.arcgis.com/pricing/}{ArcGIS Developer Program Pricing}.

The Developer subscription offers a free-of-charge option for developing and testing your applications. With this, your applications can go to production under the following conditions:

  • The app can request up to one million maps per month.

  • 50 credits are included with the Developer subscription. The costs are 40 credits for 1000 geocodes, and 0.5 credits per route generated. Place searches are free.

  • The app does not directly generate revenue. That is, end users must be able to obtain it and to use it for free.

If the above conditions cannot be met, the ArcGIS Online subscription is the correct choice, as it gives applications full access to the ArcGIS platform.

Parameters

Mandatory parameters

Parameter

Description

esri.token

Security token for using routing services only. Mapping, geocoding and place searches services do not require a token.

To use the routing services hosted on ArcGIS Online with the Esri plugin, a token is required. You can obtain a token for testing purposes, or you can sign up for an ArcGIS Online subscription.

Optional parameters

Parameter

Description

esri.useragent

User agent string sent when making network requests

esri.mapping.minimumZoomLevel

The minimum zoom level [double] at which the map is displayed

esri.mapping.maximumZoomLevel

The maximum level [double] at which the map is displayed

esri.mapping.cache.directory

Absolute path to map tile cache directory used as network disk cache.

The default place for the cache is the QtLocation/esri subdirectory in the location returned by writableLocation() , called with GenericCacheLocation as a parameter. On systems that have no concept of a shared cache, the application-specific CacheLocation is used instead.

esri.mapping.cache.disk.cost_strategy

The cost strategy to use to cache map tiles on disk. Valid values are bytesize and unitary . Using bytesize , the related size parameter (esri.mapping.cache.disk.size ) will be interpreted as bytes. Using unitary , they will be interpreted as number of tiles. The default value for this parameter is bytesize .

esri.mapping.cache.disk.size

Disk cache size for map tiles. The default size of the cache is 50 MiB when bytesize is the cost strategy for this cache, or 1000 tiles, when unitary is the cost strategy.

esri.mapping.cache.memory.cost_strategy

The cost strategy to use to cache map tiles in memory. Valid values are bytesize and unitary . Using bytesize , the related size parameter (esri.mapping.cache.memory.size ) will be interpreted as bytes. Using unitary , they will be interpreted as number of tiles. The default value for this parameter is bytesize .

esri.mapping.cache.memory.size

Memory cache size for map tiles. The default size of the cache is 3 MiB when bytesize is the cost strategy for this cache, or 100 tiles, when unitary is the cost strategy.

esri.mapping.cache.texture.cost_strategy

The cost strategy to use to cache decompressed map tiles in memory. Valid values are bytesize and unitary . Using bytesize , the related size parameter (esri.mapping.cache.texture.size ) will be interpreted as bytes. Using unitary , they will be interpreted as number of tiles. The default value for this parameter is bytesize .

esri.mapping.cache.texture.size

Texture cache size for map tiles. The default size of the cache is 6 MiB when bytesize is the cost strategy for this cache, or 30 tiles, when unitary is the cost strategy. Note that the texture cache has a hard minimum size which depends on the size of the map viewport (it must contain enough data to display the tiles currently visible on the display). This value is the amount of cache to be used in addition to the bare minimum.

esri.mapping.prefetching_style

This parameter allows to provide a hint how tile prefetching is to be performed by the engine. The default value, TwoNeighbourLayers , makes the engine prefetch tiles for the layer above and the one below the current tile layer, providing ready tiles when zooming in or out from the current zoom level. OneNeighbourLayer only prefetches the one layer closest to the current zoom level. Finally, NoPrefetching allows to disable the prefetching, so only tiles that are visible will be fetched. Note that, depending on the active map type, this hint might be ignored.

Directions language

The service supports generating directions in the following languages:

Language

Description

ar

Generate directions in Arabic

cs

Generate directions in Czech

de

Generate directions in German

el

Generate directions in Greek

en

(default) Generate directions in English

es

Generate directions in Spanish

et

Generate directions in Estonian

fr

Generate directions in French

he

Generate directions in Hebrew

it

Generate directions in Italian

ja

Generate directions in Japanese

ko

Generate directions in Korean

lt

Generate directions in Lithuanian

lv

Generate directions in Latvian

nl

Generate directions in Dutch

pl

Generate directions in Polish

pt-BR

Generate directions in Brazilian Portuguese

pt-PT

Generate directions in Portuguese (Portugal)

ru

Generate directions in Russian

sv

Generate directions in Swedish

tr

Generate directions in Turkish

zh-CN

Simplified Chinese

If only unsupported language codes are specified via the locales property, the service returns the directions using the default language, English.

Directions length units

MetricSystem (default) use meters, other values ( ImperialUSSystem , ImperialUSSystem ) use feet.