3.5. Web Map Tile Service (WMTS)

The 1.0.0 WMTS standard implemented in QGIS Server provides a HTTP interface to request tiled map images generated from a QGIS project. A typical WMTS request defined the QGIS project to use, some WMS parameters like layers to render, as well as tile parameters.

Specifications document of the service:

WMTS 1.0.0

Standartinės QGIS Serverio teikiamos užklausos:

Užklausa	Aprašymas
GetCapabilities	Returns XML metadata with information about the server
GetTile	Returns a tile
GetFeatureInfo	Grąžina duomenis (geometriją ir reikšmes) pikselio vietai

3.5.1. GetCapabilities

Standard parameters for the GetCapabilities request according to the OGC WMTS 1.0.0 specifications:

Parameter	Required	Aprašymas
SERVICE	Yes	Name of the service (WMTS)
REQUEST	Yes	Name of the request (GetCapabilities)

In addition to the standard ones, QGIS Server supports the following extra parameters:

Parameter	Required	Aprašymas
MAP	Yes	QGIS project file

URL example:

http://localhost/?
SERVICE=WMTS
&REQUEST=GetCapabilities
&MAP=/home/qgis/projects/world.qgs

3.5.2. GetTile

Standard parameters for the GetTile request according to the OGC WMTS 1.0.0 specifications:

Parameter	Required	Aprašymas
SERVICE	Yes	Name of the service (WMTS)
REQUEST	Yes	Name of the request (GetTile)
LAYER	Yes	Layer identifier
FORMAT	Yes	Output format of the tile
TILEMATRIXSET	Yes	Name of the pyramid
TILEMATRIX	Yes	Meshing
TILEROW	Yes	Row coordinate in the mesh
TILECOL	Yes	Column coordinate in the mesh

In addition to the standard ones, QGIS Server supports the following extra parameters:

Parameter	Required	Aprašymas
MAP	Yes	QGIS project file

URL example:

http://localhost/?
SERVICE=WMTS
&REQUEST=GetTile
&MAP=/home/qgis/projects/world.qgs
&LAYER=mylayer
&FORMAT=image/png
&TILEMATRIXSET=EPSG:4326
&TILEROW=0
&TILECOL=0

FORMAT

This parameter may be used to specify the format of tile image. Available values are:

jpg
jpeg
image/jpeg
image/png

If the FORMAT parameter is different from one of these values, then the default format PNG is used instead.

TILEMATRIXSET

This parameter defines the CRS to use when computing the underlying pyramid. Format: EPSG:XXXX.

TILEMATRIX

This parameter allows to define the matrix to use for the output tile.

TILEROW

This parameter allows to select the row of the tile to get within the matrix.

TILECOL

This parameter allows to select the column of the tile to get within the matrix.

3.5.3. GetFeatureInfo

Standard parameters for the GetFeatureInfo request according to the OGC WMTS 1.0.0 specification:

Parameter	Required	Aprašymas
SERVICE	Yes	Name of the service (WMTS)
REQUEST	Yes	Name of the request (GetFeatureInfo)
LAYER	Yes	Layer identifier
INFOFORMAT	No	Output format
I	No	X coordinate of a pixel
J	No	Y coordinate of a pixel
TILEMATRIXSET	Yes	Name of the pyramid
TILEMATRIX	Meshing
TILEROW	Yes	Row coordinate in the mesh
TILECOL	Yes	Column coordinate in the mesh

In addition to the standard ones, QGIS Server supports the following extra parameters:

Parameter	Required	Aprašymas
MAP	Yes	QGIS project file

URL example:

http://localhost/?
SERVICE=WMTS
&REQUEST=GetFeatureInfo
&MAP=/home/qgis/projects/world.qgs
&LAYER=mylayer
&INFOFORMAT=image/html
&I=10
&J=5

INFOFORMAT

This parameter allows to define the output format of the result. Available values are:

text/xml
text/html
text/plain
application/vnd.ogc.gml

The default value is text/plain.

I

This parameter allows to define the X coordinate of the pixel for which we want to retrieve underlying information.

J

This parameter allows to define the Y coordinate of the pixel for which we want to retrieve underlying information.