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Post by mgk1951 on Jul 16, 2008 20:18:30 GMT 8
Hi Everyone As you may have read in this forum, I have been digitising the 1921 and 1935 maps of Corregidor. The digital capture of these maps in nearly complete. By using readily available data, the maps are georeferenced to WGS84. Using GPS coordinates from waypointsdotcom , I have confirmed that features on the now digital maps correspond to WGS84 coordinates. Well, should I say almost all features correspond - there is a problem with the position of the Corregidor Lighthouse. The waypoint for the lighthouse is 50 metres west of the original georeferenced map position. So I did a bit of web surfing for confirmation of the lighthouse position. No luck. But what I discovered is: although the Corregidor Lighthouse survived the war in a badly damage condition (photo evidence within this website), it was pulled down in about 1950 and rebuilt. The structure is now taller and the support building at its base is of a greater diameter. The present lighthouse resembles the earlier structure, but because of its larger size may have been moved at least a few metres to the west. This link details some of the history of the Corregidor Lighthouse: www.lighthousedepot.com/lite_digest.asp?action=get_article&sk=0465&bhcd2=1216209750I will confirm the correct position of the present structure at the end of 2008 and advise. Regards to all mgk
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Post by fots2 on Jul 16, 2008 21:06:38 GMT 8
Hi Martyn; You may already know this but in another sub forum here, Paul mentions a GPS reference point at the lighthouse (BTN-2). I do not know exactly where it is as I was not aware of it until recently. From a government web site, here is its location: Station Name: BTN-2 Location: Topside, Corregidor Island Date Established: 2/17/1991 WGS84 Latitude: 14deg 22' 46.74622" WGS84 Longitude: 120deg 34' 35.41566" PRS92 Latitude: 14deg 22' 52.14724" PRS92 Longitude: 120deg 34' 30.50102" Fixing Method: Traversing Responsible Authority: NAMRIA www.namria.gov.ph/namria/prs92/website/home.aspI hope this helps. John
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Post by mgk1951 on Jul 16, 2008 21:54:13 GMT 8
Hi John
Co-ords would put BTN-2 about 92 metres west of the original lighthouse. On the digital 1921 map: come west of the lighthouse, straight over the signal station (building #178) to building #3. BTN-2 is about 11 metres to the south-west of the porch of building #3.
BTN-2 can be used to confirm GPS on Corregidor and hence calibrate the maps and building positions including the newer lighthouse.
I have checked up on NAMRIA website. They may have aerial photographs of Corregidor, which will be useful in all this mapping.
Regards
Martyn
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Post by fots2 on Jul 17, 2008 2:32:07 GMT 8
Martyn, this may help. I stumbled upon a written location of BTN-2. ------------------------------------------------------------------------------------ BTN-2 Location: From Pier 15 at the South Harbor, ride on a Coast Guard Sea Craft and head SW towards Corregidor Island for 2 hrs. There are 2 piers on the island, on the N side and the other pier is on the S side. Upon unloading at the pier, travel W by motor vehicle going upward to Brgy. Topside, where the Vehicle Traffic Scheme (VTS) structure and the Corregidor Lighthouse are located. Station was established on the NW corner of the overhanging flooring of the 5th floor of the VTS structure. It is about 13 m. high from the ground surface. A drilled hole 1 cm. wide and 1 cm. deep, centered in a 30 cm. x 30 cm. square cement putty, and inscribed "BTN-2, 1991, NAMRIA". WGS84 COORDINATES: N 14 22 46.74622 E 120 34 35.41566 ELLIPSOIDAL HT. : 238.9611 m. ------------------------------------------------------------------------------------ Vehicle Traffic Scheme (VTS) structure? I never heard that term before but from the description I think BTN-2 on the 5th floor of the rectangular building seen in photos #1, #3 and #4. Note the outside walkway on the 5th floor of that building. Regarding the location of the current lighthouse, use the water tanks as reference points and compare photos #1,#2 and #3. It appears that the new lighthouse was constructed on top of the old one. In photos #2 and #3, the other three buildings on the far side of the lighthouse are still in those same positions today. The water tanks appear almost the same today as they did in the 1945 photo #2 but the fourth tank is missing. FYI, photo #5 shows the old lighthouse pre-war. I bet you can't wait to get your feet on the ground to check the area out for yourself. Have fun on your next trip there. John i307.photobucket.com/albums/nn299/fots2pix/Lighthouse1.jpgi307.photobucket.com/albums/nn299/fots2pix/Lighthouse2.jpgi307.photobucket.com/albums/nn299/fots2pix/Lighthouse3.jpgi307.photobucket.com/albums/nn299/fots2pix/Lighthouse4.jpgi307.photobucket.com/albums/nn299/fots2pix/Lighthouse5.jpg
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Post by Image Hosting on Jul 17, 2008 6:03:04 GMT 8
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Post by Image Hosting on Jul 17, 2008 6:04:25 GMT 8
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Post by Deleted on Jul 19, 2008 5:05:04 GMT 8
Great pictures of the area around the reconstructed Spanish lighthouse on Topside John. I have always been intrigued by the Spanish looking structure to the north of the lighthouse and embedded in the ground, it has a damaged stone roof, maybe 10 ft by 10 ft? unknown depth.
I have been told many things about it's previous use but have not gotten a definitive answer.
Rainwater in the past, (and present)? was collected from the roof of the nearby lighthouse and channeled into a storage area near this structure, was that it's previous use? I was told by one of the guides, that it was the island bakery in Spanish times...... It is presently full of trash, (old bombs also?) who knows what? What a treasure to bring it back into the light of day.......... Any voices out there as to it's past use and future unveiling?
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Post by mgk1951 on Jul 19, 2008 9:09:47 GMT 8
Hi John
The photos of the lighthouse are excellent. The rebuilt structure looks a lot bigger overall and although its position looks somewhat similar to the original position, it maybe a little to the east. It appears closer to the salt water tanks than in the 1945 photograph. Your aerial is a close match to the 1945 with C47 and parachutes.
BTN-2 is going to be hard to access - I had hoped it was at ground level and not 5 stories up.
Anyway, your photos have helped me out with the mapping and yes I cannot wait to check these things out in person at the end of this year (trip is definite - I have the tickets).
Regards
Martyn
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Post by mgk1951 on Jul 19, 2008 9:21:18 GMT 8
Hi tomaring
Is the below ground structure you refer to about 20 metres almost exactly north of the lighthouse? If it is there is a masonry cistern marked and notated at this position on the 1921 and 1935 maps .
Regards
Martyn
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Post by The Phantom on Jul 20, 2008 3:04:46 GMT 8
How is the Cistern noted on the maps Martyn? The look of the structure, and it's location, and the water drainage in it's immediate area point to Cistern as it's use. Would love to see what's in the bottom..........
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