问题
May I know how to determine the output of Bing map static image? Previously it used to be in png but now it is in jpeg. May I know how to revert back to png format?
Example: Display the image with the link below:
http://dev.virtualearth.net/REST/V1/Imagery/Map/Road/space%20needle,seattle?mapLayer=TrafficFlow&mapVersion=v1&key=BingKey
The image is in jpeg. How to make it to png? Thanks.
回答1:
I don't think you can request the image in a different format.
From http://msdn.microsoft.com/en-us/library/ff701724.aspx :
This URL returns an image in one of the following formats:
- PNG (image/png)
- JPEG (image/jpeg)
- GIF (image/gif)
You cannot specify the output format for the map image. The image type is chosen based on parameters such as imagerySet.
If you really want a PNG, you could make the request from a server-side script and then construct a PNG file programmatically before serving that back to the client (using PHP's imagepng function, for example)
回答2:
I know it's a while you posted this question, but as there is no answer yet, and I got here via Google I'll supply an answer anyway.
You can use the format / fmt parameter.
From: http://msdn.microsoft.com/en-us/library/ff701724.aspx
One of the following image format values:
gif: Use GIF image format.
jpeg: Use JPEG image format. JPEG format is the default for Road, Aerial and AerialWithLabels imagery.
png: Use PNG image format. PNG is the default format for CollinsBart and OrdnanceSurvey imagery.
Examples:
format=jpeg
fmt=gif
来源：https://stackoverflow.com/questions/6205006/bing-static-map-image-type