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CSULB Geospatial Research and Mapping (GRAM) Field Program
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Daily Blog for Samantha Hauser


Endless Shapefiles

Posted on July 3, 2012 by Samantha Hauser

Post for 07/03/2012

Today, I made a lot of progress with my data processing and analysis. I obtained the georeferenced historic maps from the lovely Avery Sandborn and went through them to pick out features of the quarry, prehistoric wetlands/waterbodies, and archaeological findings. First, I had to subset said features in ERDAS, which took up most of the morning, and then turn them into shapefiles in ArcMap. I ended up making 23 shapefiles (polygons and lines). What was very interesting was how the lake changed shape and position (slightly), but I am unsure whether that is due to the accuracy of the hand-drawn maps or due to physical causes.

Here are some interesting observations I made:

  1.  The lake disappears after 1918
  2.  After the lake disappears the Waiopili Heiau appears on the map  (1959)
  3.  As of 2001, neither the lake nor the heiau appear on the map. Only the quarry is apparent.
  4.  The quarry started in the area at the latest in 1910

I am currently running the LiDAR data analysis as I type this. Hopefully the problem was fixed and my momentum can continue.

First day of analysis

Posted on July 3, 2012 by Samantha Hauser

Post for 07/02/2012

Today was a day of struggling through the LiDAR data again. I managed to get to a DEM of the area but I will have to redo them since I missed a critical step. I converted the las file to multipoint then did an IDW interpolation. From there I made a slope and a hillshade layer. Here are some screenshots:

Hillshade:

 

 

 

 

 

 

 

 

 

 

Slope:

 

 

 

 

 

 

 

 

 

 

IDW:

 

 

 

 

 

 

 

 

 

 

After the lab work was pretty much over for the day, the archaeology group met up with Drs. Lipo and Wechsler. They managed to figure out the problem with the LiDAR data, so I plan to work on those tomorrow. I also plan to work through the georeferenced historic maps to extract out some shapefiles.

Wish me luck!

Time to go back to The Beach

Posted on July 2, 2012 by Samantha Hauser

Today was mostly comprised of packing, getting to the airport, and flying back to California. Not very exciting I know.

I would like to take this time to thank everyone in Kauai who helped us out and made it a once in a lifetime experience: Matthew Lucas, Dr. David Burney, Dr. Lida Pigott Burney, Ted Ralston, Mary, Barry, Hal, Teddy Blake, and Dr. Terry Hunt. It was a wonderful learning experience and everyone was so helpful during the whole stay to make us feel at home. I will miss you all and this thank you does not do justice for how grateful I feel.

 

Last day in Kauai :(

Posted on July 2, 2012 by Samantha Hauser

Post for June 30, 2012

Such a bittersweet day. We all had a beach BBQ today at Poipu beach; the professors, GA’s, and our friends at NTBG and the Makawahi (hopefully I spelled that correctly :) ) Cave Reserve joined us. It was wonderful to have this time to see everyone before we leave for California and I will miss them dearly.

Wildlife Highlight: We got to see a monk seal come up on the beach and rest. He was beautiful, and this was my first time seeing a seal in the wild. I was as happy as a clam.

Last field day

Posted on July 2, 2012 by Samantha Hauser

Posted for June 29, 2012

Today, the archaeology team went to the NTBG library and worked on getting ahead on our data processing for the morning. I played around with the LiDAR data, but it was still giving me a hard time. I ended up being able to accomplish an IDW (inverse distance weighted) DEM (digital elevation model), and then putting the slope, hillshade, and contour lines on it. Although this still didn’t help too much because when I tried to open the file later, the layers weren’t showing up. I plan to work on this Dr. Wechsler back in Long Beach. In the afternoon, we joined up with the hydrology team to enjoy some surf and sun.

We had a night lecture with the famous Dr. Terry Hunt, John’s adviser back at U of Hawaii. He talked about the archaeology and cultural history of the pacific islands and how Hawaii plays into that. It was great to have some more background on the area and to see how the expansion of human arrival on the islands.

Presentation Time

Posted on June 29, 2012 by Samantha Hauser

Today, Avery and I went to the National Tropical Botanical Garden for some data processing time. I worked through georeferencing the orthophoto made from the Gatewing X100 imagery. It seems to match up pretty well except for the very top of a path that leads into the quarry, but for the purposes of my project that area is not important. Dr. Burney and I then met up to discuss areas that needed to be addressed in the restoration plan. We decided on three “layers”: hydrology, vegetation, and archaeology. I digitized (very roughly on paint) the plan for the presentation later in the day. I plan to do it properly and create shape files for everything once processing is more underway. At night, I presented about my research so far.

Georeferenced Picture of the Quarry:

 

 

 

 

 

 

Vegetation Layer: (Click on the picture to see the outline)

 

 

 

 

 

 

 

 

 

 

Archaeology Layer: (Click on the picture to see the outlines)

 

 

 

 

 

 

 

 

 

 

Hydrology Layer: (Click on picture to see outlines)

 

 

 

 

 

 

 

 

 

 

Day 10 in Kauai: Tragedy in the Kauai Triangle

Posted on June 28, 2012 by Samantha Hauser

This morning, Team Archeo visited the Crum Cottage (aka the Professors’ house) to work on some data processing while Dr. Lipo and John worked on the hexacopter. There, I tried to work through some of the LiDAR data, which proved to be problematic. The bearings are impossible to know since its essentially all point data. Luckily, Dr. Wechsler saved the day and will subset the quarry area so that I just need to process it without the unnecessary stress of trying to figure out which points are those of the quarry.

In the afternoon, we accompanied Ted, Dr. Lipo, and Dr. Lee for some kite flying. This is when the drama started.

First, all the men left Avery and I, who are two very small girls, holding the kite by hand; we almost flew away with it! Then we finally get the kite set up properly and start driving to get Kite-Aerial-Photography of the vegetation grid… AND the kite snaps off and flies off with the cameras. Four of us, Lida Burney, John, Avery and I, chased after it. After walking a mile searching for the kite, the rest of the crew beat us there and took the kite. (Not very fair if you ask me :) ) Luckily, the two cameras that were attached to the kite were safe and unharmed! The ironic part of the crash site is that this was the same crash site of the Gatewing X100. Henceforth, this is the Koloa Kauai Triangle, where aerial photography instruments go to crash. Despite all the drama it was exciting and we were all relieved that the kite was found and the camera was not broken.

Day Nine in Kauai: Map Time

Posted on June 27, 2012 by Samantha Hauser

This morning, Avery and I accompanied Dr. Burney and Mike FERRIS to the Grove Farms Museum. There we went through historic maps of Koloa, aiming for maps including topographic and landscape information. Once found, we digitized them by taking pictures with a super fancy camera, which had 48 MP resolution. (I will upload some pictures of the process). This whole process took about three hours. As a reward, Dr. Burney took us all to the Kauai Museum in town to visit the gift shop.

We met up with the other half of our group at the NTBG education center where we focused on data processing. I’ve been running Photoscan almost 17 hours for an orthophoto and point cloud of the Grove Farm Quarry. I tried to process the LiDAR data but I didn’t have enough time to finish it. Creating a DEM from the LiDAR data will be my next task once the quarry point cloud is done.

 

Day Eight in Kauai

Posted on June 26, 2012 by Samantha Hauser

Dr. Lipo has arrived! The archaeology team met today and discussed our individual projects. For my project overview, you should definitely check out our group blog. If that is too much work, see below I will copy mine here. Afterwards, we went to the prehistoric koloa field system and took GPS coordinates for the auwai and field boundaries. Chuck and Dave flew the fixed wing plane and kite for photographs. There were a few scares with the kite crash landing, but the camera survived!

Project synopsis:

The Grove Farm Quarry has not been used for years and historically was a place for Hawaiian burials and habitat for endangered species such as the Hawaiian Stilt. The National Tropical Botanical Garden hopes to restore this area. Samantha is focusing on the stone quarry restoration by mapping out the historic and present landscape. First, the present landcape must be mapped out with Gatewing X100 photographs, ground truthing with gps data, and LiDAR data. This data has been generated, but the historic data has not yet been collected. The historic landscape can be taken from historic topographic and landscape maps from museum resources tomorrow.  By looking at these two time periods, the potential restoration efforts can be determined

Nualolo

Posted on June 25, 2012 by Samantha Hauser

Aloha!

We woke up at the crack of dawn…actually before dawn, to catch the zodiac boats this morning. Anyone still half asleep sure woke up during the ride to Nualolo. Although it was pretty rocky and my boat got soaked from the surf, it was so much fun! Once there, Dr. Burney took us around and gave us a tour of the archaeology and vegetation of the area. It is amazing to think that people lived on such a small piece of beach subject to the Pacific storms. Dr. Lipo also had us work on some GPR (aka Ground Penetration Radar) to see if there were any skeletons or artifacts of interest under the soil.

The rest of the day, well until 5 pm, we had the day off to enjoy the surroundings and beach. Then the zodiac again!

Lots of work still to do. Goodnight!

About Samantha Hauser

I am currently an ecology, evolution and natural resources major with a certificate/minor in environmental geomatics at Rutgers, The State University of New Jersey in New Brunswick, NJ.