The /map resource represents the mapping capabilities of Weave.
| Note |
|---|
| For Weave to be able to provide mapping functions one or more map engines must be configured. A map engine abstracts an application or service which is capable of generating map images. |
Top-level resource: services/v1/map
Sub-resources:
1. /map/mapengines
Provides a list of all map engines configured and available on Weave.
| Info | ||
|---|---|---|
| ||
Example 1
| Code Block | ||||
|---|---|---|---|---|
| ||||
curl -X GET --header 'Accept: application/json' 'http://localhost:8080/weave/services/v1/map/mapengines' |
Output:
| Code Block | ||||
|---|---|---|---|---|
| ||||
{
"success": true,
"mapengines": [
{"id": "mapengine.upload"},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.area_details",
"override": {"entity": {
"id": "local_government_area",
"content": "sld/LGA.sld"
}},
"orderCheck": false
},
{"id": "google.streets"},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.main",
"override": {"polygon": {
"stroke-width": 1,
"fill-color": "red",
"fill-opacity": 0.25,
"stroke-color": "red"
}},
"orderCheck": false
},
{
"acetate": false,
"selection": false,
"crs": "EPSG:3857",
"tokens": {"token": {
"name": "ITEMFONTSIZE",
"value": 11
}},
"id": "nsw_imagery_wms",
"url": "http://maps.six.nsw.gov.au/arcgis/services/public/NSW_Imagery/MapServer/WMSServer?VERSION=1.3.0"
},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.property_details",
"override": {"entity": {
"id": "property",
"content": "sld/Property.sld"
}},
"orderCheck": false
},
{
"acetate": false,
"id": "nswdpe.ov",
"selection": false,
"crs": "EPSG:3857",
"url": "http://192.168.2.146:80/cgi-bin/qgis_mapserv.fcgi?map=/data/maps/nswdpe_ov.qgs&VERSION=1.3.0"
},
{
"acetate": false,
"selection": false,
"crs": "EPSG:3857",
"scales": {"scale": [
{
"maxScale": 1,
"minScale": 1,
"layer": "development_application"
},
{
"maxScale": 1,
"minScale": 1,
"layer": "major_projects_jobs_lap"
},
{
"maxScale": 1,
"minScale": 1,
"layer": "major_projects_sites_lap"
}
]},
"tokens": {"token": {
"name": "ITEMFONTSIZE",
"value": 11
}},
"id": "nswdpe",
"url": "http://192.168.2.146:80/cgi-bin/qgis_mapserv.fcgi?map=/data/maps/nswdpe.qgs&VERSION=1.3.0"
}
]
}
|
2. /map/mapengines/{mapengineid}/layers
Provides a list of all map layers available for a given map engine.
Example 2 -
| Code Block | ||||
|---|---|---|---|---|
| ||||
curl -X GET --header 'Accept: application/json' 'http://localhost:8080/weave/services/v1/map/mapengine/nswdpe/layers' |
Output:
| Code Block | ||||
|---|---|---|---|---|
| ||||
{
"success": true,
"layers": [
{
"scaleRange": "<500000.0",
"boundingBoxes": [
"{minx: 142.269, miny: -37.5493, maxx: 153.695, maxy: -28.1079, crs: 'GEOGCS[\"WGS 84\", DATUM[\"World Geodetic System 1984\", SPHEROID[\"WGS 84\", 6378137.0, 298.257223563, AUTHORITY[\"EPSG\",\"7030\"]], AUTHORITY[\"EPSG\",\"6326\"]], PRIMEM[\"Greenwich\", 0.0, AUTHORITY[\"EPSG\",\"8901\"]], UNIT[\"degree\", 0.017453292519943295], AXIS[\"Geodetic longitude\", EAST], AXIS[\"Geodetic latitude\", NORTH], AUTHORITY[\"EPSG\",\"4326\"]]'}",
"{minx: 1.58373E7, miny: -4515950.0, maxx: 1.71093E7, maxy: -3262580.0, crs: 'PROJCS[\"WGS 84 / Pseudo-Mercator\", GEOGCS[\"WGS 84\", DATUM[\"World Geodetic System 1984\", SPHEROID[\"WGS 84\", 6378137.0, 298.257223563, AUTHORITY[\"EPSG\",\"7030\"]], AUTHORITY[\"EPSG\",\"6326\"]], PRIMEM[\"Greenwich\", 0.0, AUTHORITY[\"EPSG\",\"8901\"]], UNIT[\"degree\", 0.017453292519943295], AXIS[\"Geodetic longitude\", EAST], AXIS[\"Geodetic latitude\", NORTH], AUTHORITY[\"EPSG\",\"4326\"]], PROJECTION[\"Popular Visualisation Pseudo Mercator\", AUTHORITY[\"EPSG\",\"1024\"]], PARAMETER[\"semi_minor\", 6378137.0], PARAMETER[\"latitude_of_origin\", 0.0], PARAMETER[\"central_meridian\", 0.0], PARAMETER[\"scale_factor\", 1.0], PARAMETER[\"false_easting\", 0.0], PARAMETER[\"false_northing\", 0.0], UNIT[\"m\", 1.0], AXIS[\"Easting\", EAST], AXIS[\"Northing\", NORTH], AUTHORITY[\"EPSG\",\"3857\"]]'}"{
"success": true,
"mapengines": [
{
"id": "mapengine.upload"
},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.area_details",
"override": {
"entity": {
"id": "local_government_area",
"content": "sld/LGA.sld"
}
},
"orderCheck": false
},
{
"id": "google.streets"
},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.main",
"override": {
"polygon": {
"stroke-width": 1,
"fill-color": "red",
"fill-opacity": 0.25,
"stroke-color": "red"
}
},
"orderCheck": false
},
{
"acetate": false,
"selection": false,
"crs": "EPSG:3857",
"tokens": {
"token": {
"name": "ITEMFONTSIZE",
"value": 11
}
},
"id": "nsw_imagery_wms",
"url": "http://maps.six.nsw.gov.au/arcgis/services/public/NSW_Imagery/MapServer/WMSServer?VERSION=1.3.0"
},
{
"acetate": false,
"selection": false,
"legend": true,
"format": "image/png32",
"id": "selection.property_details",
"override": {
"entity": {
"id": "property",
"content": "sld/Property.sld"
}
},
"orderCheck": false
},
{
"acetate": false,
"id": "nswdpe.ov",
"selection": false,
"crs": "EPSG:3857",
"url": "http://192.168.2.146:80/cgi-bin/qgis_mapserv.fcgi?map=/data/maps/nswdpe_ov.qgs&VERSION=1.3.0"
},
{
"acetate": false,
"selection": false,
"crs": "EPSG:3857",
"scales": {
"scale": [
{
"maxScale": 1,
"minScale": 1,
"layer": "development_application"
},
{
"maxScale": 1,
"minScale": 1,
"layer": "major_projects_jobs_lap"
},
{
"maxScale": 1,
"minScale": 1,
"layer": "major_projects_sites_lap"
}
]
},
"tokens": {
"token": {
"name": "ITEMFONTSIZE",
"value": 11
}
},
"id": "nswdpe",
"url": "http://192.168.2.146:80/cgi-bin/qgis_mapserv.fcgi?map=/data/maps/nswdpe.qgs&VERSION=1.3.0"
}
]
} |
3. /map/show
Represents the map imaging capabilities of Weave. This resource supports both HTTP GET and HTTP POST requests. A GET request may specify a map images from a single map engine whereas a POST request may specify a composite image consisting of multiple images sourced from different map engines. POST requests may also specify selections which can be drawn using a specially configured 'selection map engine' in Weave.
Parameters
3.1. GET query parameters
mapengine.id - string - map engine identifier as per configuration
layers - comma separated list of strings - map layers as per configuration
styles - comma separated list of strings - styles as per map layer configuration
crs - string - Coordinate reference system used to specify the map envelope coordinates (minx, miny, maxx, maxy)
minx - decimal - Left margin x axis value of the map image
miny - decimal - Bottom margin y axis value of the map image
maxx - decimal - Right margin x axis value of the map image
maxy - decimal - Top margin y axis value of the map image
scale - Map scale - ratio of a unit of distance on the map image to actual distance on land - if different from the scale derived by comparing the map envelope to width and height, envelope will be readjusted
dpi - integer - Logical (CSS) dots-per-inch value on the client display
width - integer - image width in pixels
height - integer - image height in pixels
opacity - decimal - image transparency as a decimal <= 1.0
3.2. Sample POST body parameter
| Code Block | ||||
|---|---|---|---|---|
| ||||
{
"map.descriptions": [
{
"opacity": 1,
"layers": "0",
"map.engine": "google.streets"
},
{
"opacity": 1,
"layers": "addresspoi",
"map.engine": "nswdpe"
},
{
"opacity": 1,
"layers": "_selection.all",
"map.engine": "selection.main"
}
],
"selections": [
{
"entityid": "property",
"featureids": [
"2035960_Unit_1_1_Market_Street__11_Sydney_DP777449"
]
}
]
}
|
Return values
| Accept header | Return value example | Description | |||||||
|---|---|---|---|---|---|---|---|---|---|
| image/* | <image binary data stream, default format is PNG> | image data | |||||||
| image/png | <image binary data stream, PNG format> | image data | |||||||
| image/jpeg | <image binary data stream, JPEG format> | image data | |||||||
| application/json |
| JSON object containing a 'path' property which points to a generated image on the server |
Example 3 - Draw a map image using a map engine backed by a WMS server (HTTP GET)
| Code Block | ||||
|---|---|---|---|---|
| ||||
curl -X GET --header 'Accept: image/png' 'http://localhost:8080/weave/services/v1/map/show?mapengine.id=nswdpe&layers=addresspoi%2Clocal_government_area%2Csuburb&crs=EPSG%3A3857&minx=16773188.612842508&miny=-4047990.362440507&maxx=16862619.93593616&maxy=-3982636.7032566806&scale=295000&dpi=96&width=400&height=400&opacity=0.75' > map_show.png |
Output:
Example 3 - Draw a map image by specifying pre-configured layers and a selection (HTTP POST)
| Code Block | ||||
|---|---|---|---|---|
| ||||
curl -X POST --header 'Content-Type: application/json' --header 'Accept: application/json' --data '{"map.descriptions":[{"opacity":1,"layers":"0","map.engine":"google.streets"}, {"opacity":1,"layers":"addresspoi","map.engine":"nswdpe"},{"opacity":1,"layers":"_selection.all","map.engine":"selection.main"}],"selections":[{"entityid":"property","featureids":["2035960_Unit_1_1_Market_Street__11_Sydney_DP777449"]}]}' 'http://localhost:8080/weave/services/v1/map/show?crs=EPSG%3A3857&minx=16831751.916958902&miny=-4011871.179336485&maxx=16832450.599170577&maxy=-4011360.603874112&scale=288895.277144&dpi=96&width=960&height=540&opacity=1&imagetype=image%2Fpng' > map_1_layer.png |
Output:
| Note |
|---|
| Producing a single map image by combining a number of map images sourced from multiple map engines is a resource intensive process. Where Weave application's resources are constrained, this approach is not recommended for implementing live map clients. Instead it is recommended that images (with an opacity less than 1) are superimposed as separate layers at the client end. |