2023年10月16日 · bbox: The bounding box is automatically determined by taking the union of the bounds of the specified layers. In essence, it determines the extent of the map. By default, if you do not specify bbox, it will show you everything. If you have one layer of Los Angeles, and another of New York, it show you most of the United States.

2014年5月27日 · First of all you can't use both BBOX and FILTER in key value pair formatted GET request. In the WFS standard version 1.1.1 it is written as "BBOX (Prerequisite: TYPENAME) (Mutually exclusive with FEATUREID and FILTER.) In lieu of a FEATUREID or FILTER, a client may specify a bounding box as described in subclause 13.3.3."

2019年5月14日 · I have a vector layer, in GeoJSON with a Vector source on which I applied the BBOX strategy. I have unique IDs for each feature in the layer and having a look at the network tab in the browser the strategy is working, bringing back all the features at a given extent, whenever I move the map.

2019年5月11日 · The layer which loads, loads all the data within my view extent, not just the data I requested in BBOX. Afterwards I need to get some attributes of the loaded data, therefor I wish to limit the amount of data, as loading times easily get too high.

2021年1月27日 · Inside a plugin i'm trying to load a wms layer, with python in QGIS. Everything works but the size doesn't match: is downloading the entire wms layer not the extent of the window i'm using in QGIS (

2016年12月1日 · filt3r = "BBOX(the_geom,x_min, y_min, x_max, y_max)" First of all, replace "the_geom" with the name of your geometry field; for me this is SHAPE You need to make sure your extents are in the same units as the coordinate system (CRS) as your source data.

2020年4月2日 · The BBOX is specified in units of the CRS (minx,miny,maxx,maxy). In version 1.3.0, X is the first listed axis and Y the second axis, see EPSG registry for details epsg-registry.org for axis order. –

2023年7月18日 · I'm trying to retrieve satellite imagery in high resolution of a full country with a WMS API. I need them in HR since I want to perform a segmentation task on them.

Strange thing. i get correct bbox in lon lat. After transform i get meters bbox its correct too. But when use zoomToExtent nothing heppens. Im add Controls.MousePosition and mouse show that my map out of extent which i get. Whats wrong? –

Generally to calculate the area of a bbox in a projected coordinate system since it's a (big) rectangle you can use the area formula : area = (sw_longitude - ne_longitude) * (sw_latitude - ne_latitude) Depending now on your spatial location (ie you're in a projected crs) the above formula will give you square mapunits (km^2, m^2 whatever).