Hong Kong Google Map updated with new satellite images!
June 21, 2006
As you may have noticed, Google Map just has a major updates of satellite images, including Hong Kong! Now some regions originally without high resolution satellite images are upgraded, such as at the east of Hong Kong, around Sai Kung, and upper areas. And more exciting is Hong Kong Disneyland on the map has updated, now has some more details, rather than just a construction site before. Click here to have a look: Hong Kong Disneyland
But sadly, most of the areas are seems in fog now, most likely contributed by the poor air quality of Hong Kong in the recent years.
June 23, 2006 at 9:01 am
Hi, did you have any problems after upgrading from v1 to v2? I found that all my points seem to have shifted several meters East after the upgrade. eg compare http://www.batgung.com/articles/mount-parish-tunnel-map.v1.htm with
after at http://www.batgung.com/articles/mount-parish-tunnel-map.htm
If you zoom in you’ll see that the overlay has shifted right on the v2 image.
Regards, batgung
June 24, 2006 at 10:59 am
This is very good web mapping website. How old of the satellite image? Can I know the coordinates when the cursor hover the map? I want to know how to do the webmapping? (e.g. ASP, JSP..) How you can share with Centamap.com info about the annotation? Any agreements with centamap.com?
Thanks
June 26, 2006 at 10:35 pm
Really thx for ur interest and suggestion. It’s a good idea to display the coordinates when the cursor hover on the map, will add it in the next update.
For the web-mapping part, actually nearly all the processings are done at the front-end using javascript. It consists of a coordinates-mapping, from WGS84 used by google map to HK1980 used by centamap. Then get the corresponding centamap image, make some colors as transparent as needed using javascript, then place it on top of google map.
Honestly, no application has been made to centamap yet, so if this site is considered as a violation of their copyright later, it will be closed as needed.
Welcome any further questions and/or suggestions if u have any ^^
June 27, 2006 at 12:09 pm
Sorry, forgot to answer ur question on satellite image. All the satellite images are powered by google map, and the hong kong part is from DigitalGlobe. According to the acquisition date as mentioned in a DigitalGlobe related site (http://imageatlas.globexplorer.com/ImageAtlas/view.do?group=digitalglobe&lat=39.5276&lon=-97.142&zoom_level=1), this current set of satellite images of hong kong is taken on around 10 Aug 2004.
July 25, 2006 at 7:13 pm
Hi batgung, yes, I adjusted a bit the coordinate transformation after the map updates by Google, so I guess the shifting is due to the update of the map, more than the API upgrade
September 8, 2006 at 2:21 pm
Can I know how to use the Centamap API? Any info?
Thanks
September 9, 2006 at 11:13 pm
The link to Centamap map is:
‘http://www.centamap.com/scripts/centamapgif.asp?name=cent8&x=’ + Cx + ‘&y=’ + Cy + ‘&z=’ + mapScale + ‘&ly=&vm=&lb=&lp=&mt=&ts=0&co=&sx=&sy=&sl=&ss=0&ca=0&mx=0&my=0&ms=2′
where (Cx, Cy) is HK1980 coordinates, mapScale is the zoom level.
But be aware that Centamap has launched a new version, this link is for its old version and may have chance to be unavailable for some time in the future.
If you are really interested, you may also leave your email address here or send us (goodyeah.net@gmail.com), and we can share the source codes of this site with you for reference.
^^