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Saturday, 30 March 2013
spy camera a Glasses
One of the most useful and ingenious ways of using a hidden,
wireless camera is to put them into sunglasses. Tom Cruise and his pair
of eyeglasses in Mission Impossible have gone down in the annals of
surveillance history. Spy camera glasses have the camera embedded
somewhere within them, for example in the nosepiece, and capture images
as the wearer of the glasses sees them.
Spy eyewear, or spy camera glasses, make it possible to carry on operations without the knowledge of others. It is not only the sunglass that can function as a hidden camera. There are very unobtrusive hidden cameras that look like a normal case for your eyeglasses. They are plug-and-play ready and very portable.
Spyglasses would naturally be wireless and hidden. The same considerations that apply to regular spy cameras, such as resolution, battery life, etc., will also apply here.
The video signals are usually sent to a recorder or transmitter that is worn by the wearer of the glasses; this latest technology would require a transmitter placed not more than 18" away from the camera. This is possible if it is worn on a belt or placed in a pocket. In case of a transmitter being connected, any equipment within the range of this transmitter can be fitted with a receiver and you can capture the full footage on to your VCR, TV, or computer. Recorders will be limited by the memory they have.
Spyglasses are the tools that drive investigative journalism, crime investigation, and espionage. The cost of spyglasses can be quite high. This, coupled with their possible useful applications, makes them more professional equipment rather than home equipment.
Spy eyewear, or spy camera glasses, make it possible to carry on operations without the knowledge of others. It is not only the sunglass that can function as a hidden camera. There are very unobtrusive hidden cameras that look like a normal case for your eyeglasses. They are plug-and-play ready and very portable.
Spyglasses would naturally be wireless and hidden. The same considerations that apply to regular spy cameras, such as resolution, battery life, etc., will also apply here.
The video signals are usually sent to a recorder or transmitter that is worn by the wearer of the glasses; this latest technology would require a transmitter placed not more than 18" away from the camera. This is possible if it is worn on a belt or placed in a pocket. In case of a transmitter being connected, any equipment within the range of this transmitter can be fitted with a receiver and you can capture the full footage on to your VCR, TV, or computer. Recorders will be limited by the memory they have.
Spyglasses are the tools that drive investigative journalism, crime investigation, and espionage. The cost of spyglasses can be quite high. This, coupled with their possible useful applications, makes them more professional equipment rather than home equipment.
Logitech Web Camera is For You
I know most laptops have a built-in web camera feature. There is
no innovation on desktop PC with built-in webcam. Well, not just yet. I
know my laptop has a built-in camera but I don't trust its quality.
Logitech web camera boasts on image and sound quality. It is very important owning the best webcam if you talk to your boss on the web a lot. I know my older sister had her job interview via the web. I wanted to teach English online to Korean students. This is why owning a quality webcam is really important. Getting logitech web camera software is not that difficult too.
Logitech quick cam web has a lot more to offer especially their RightLight and RightSound technology. RightLight technology makes you look real in all lighting conditions with so little distortion. RightSound technology makes sure you don't sound funny. You just sound natural with very little background noise.
Picture and image quality wise, Logitech has incorporated Carl-Zeis optic technology, has autofocus and, for Logitech Webcam Pro 9000, experience photo sharpness of up to 8 mega pixel. Logitech also take pride in the quality of their webcam's sound. You will never hear echo bouncing off from the other location.
There are a number of webcams offered by Logitech such as logitech orbit webcam. It has even gone Pro enough to use for photo shoots of yourself. How about taking candid pictures or video chatting, anyone? Now, you won't feel how far away you are from people that you love.
So before buying, know what webcam features you will need. Logitech web camera has every type. You can easily find one webcam that fits your needs. It does not matter if you are using Windows or Mac, laptop. Are megapixels important for you or do you like the desk tracking feature more? Or do you want a nice looking webcam?
1. Research. The World Wide Web is rich with information. We know that. I always check forums, online reviews and ask friends who are using logitech quickcam web camera.
2. Decide on a budget. Is this really a priority for you? Is this for business or for personal use? The price does matter. You would want to invest on the best without sacrificing quality over the price.
3. Check the aesthetics. I know, for techie people, they won't mind it. But our preferences differ. The design does matter. The cuter and compact the webcam is the better. It's a conversation piece in itself.
After doing much research, I kind of fancy the Logitech Webcam Pro 9000. For me, it is top of the line. Just think about clear images, no distortion, natural sound and no echo. It is going to be great once I get to teach English online and video chatting with my older sister from the States.
Logitech web camera boasts on image and sound quality. It is very important owning the best webcam if you talk to your boss on the web a lot. I know my older sister had her job interview via the web. I wanted to teach English online to Korean students. This is why owning a quality webcam is really important. Getting logitech web camera software is not that difficult too.
Logitech quick cam web has a lot more to offer especially their RightLight and RightSound technology. RightLight technology makes you look real in all lighting conditions with so little distortion. RightSound technology makes sure you don't sound funny. You just sound natural with very little background noise.
Picture and image quality wise, Logitech has incorporated Carl-Zeis optic technology, has autofocus and, for Logitech Webcam Pro 9000, experience photo sharpness of up to 8 mega pixel. Logitech also take pride in the quality of their webcam's sound. You will never hear echo bouncing off from the other location.
There are a number of webcams offered by Logitech such as logitech orbit webcam. It has even gone Pro enough to use for photo shoots of yourself. How about taking candid pictures or video chatting, anyone? Now, you won't feel how far away you are from people that you love.
So before buying, know what webcam features you will need. Logitech web camera has every type. You can easily find one webcam that fits your needs. It does not matter if you are using Windows or Mac, laptop. Are megapixels important for you or do you like the desk tracking feature more? Or do you want a nice looking webcam?
1. Research. The World Wide Web is rich with information. We know that. I always check forums, online reviews and ask friends who are using logitech quickcam web camera.
2. Decide on a budget. Is this really a priority for you? Is this for business or for personal use? The price does matter. You would want to invest on the best without sacrificing quality over the price.
3. Check the aesthetics. I know, for techie people, they won't mind it. But our preferences differ. The design does matter. The cuter and compact the webcam is the better. It's a conversation piece in itself.
After doing much research, I kind of fancy the Logitech Webcam Pro 9000. For me, it is top of the line. Just think about clear images, no distortion, natural sound and no echo. It is going to be great once I get to teach English online and video chatting with my older sister from the States.
CCTV camera at your office
We have heard about and perhaps seen CCTV cameras. But do we
actually know what work it does? A CCTV camera or a closed circuit
television camera can be seen at many places these days. These cameras
can be of two types mainly, either an analogue still camera or a digital
video camera. These cameras are used to transmit pictures to any venue.
They are put up in hiding places in shops, malls, metro and railway
station, offices, airport, government buildings, lifts and so on. Images
and videos get recorded for surveillance purpose. The videotapes can be
gone through later on if any urgency strikes.
Safeguarding your home, shop and office from burglars were the major concerns of the people. But nowadays a mishap can occur at any place and time. And not to talk about terrorism! Security is in high demand in this scenario. You will never know what misfortune may befall you but at least you can be alert from beforehand to avoid unnecessary consequences. These cameras will keep constant tracks of the happenings of the respective places and the invigilators will keep an eye glued to the screen. They will immediately alert officials if they suspect anything wrong. Buying and installing a CCTV camera at your office is very essential.
Necessity of a CCTV Camera at the Work Place
Your office is a huge and sprawling one. Your company has hundreds of employees. Now of-course you have security guards placed at the main entrance and also gates with metal detectors, but are they enough to suffice your safety measures? So while you are planning to buy Office Equipment that will adorn the office rooms, let CCTV cameras be on the top of your priority list. This is a vital issue and must not be ignored.
As an Office Equipment these small devices can be set up at all the entrance and exit points, the end of long corridors, lifts, canteen, front of the washrooms and and staircases. There must be a control room from where well experienced staff members can control the angle and aperture of the cameras. They must be an expert in this field to give you an excellent service.
Where to Buy CCTV Cameras
CCTV cameras can be purchased from electronic stores. The online sites also display images of various types. The prices will vary with different models and brands. The price of these cameras goes easy on your pockets.
So get hold of a technician as soon as possible to set up these hidden cameras at your office. These will keep a record of the events of the entire day and can be seen later on if required.
After all your own safety is in your own hands.
Safeguarding your home, shop and office from burglars were the major concerns of the people. But nowadays a mishap can occur at any place and time. And not to talk about terrorism! Security is in high demand in this scenario. You will never know what misfortune may befall you but at least you can be alert from beforehand to avoid unnecessary consequences. These cameras will keep constant tracks of the happenings of the respective places and the invigilators will keep an eye glued to the screen. They will immediately alert officials if they suspect anything wrong. Buying and installing a CCTV camera at your office is very essential.
Necessity of a CCTV Camera at the Work Place
Your office is a huge and sprawling one. Your company has hundreds of employees. Now of-course you have security guards placed at the main entrance and also gates with metal detectors, but are they enough to suffice your safety measures? So while you are planning to buy Office Equipment that will adorn the office rooms, let CCTV cameras be on the top of your priority list. This is a vital issue and must not be ignored.
As an Office Equipment these small devices can be set up at all the entrance and exit points, the end of long corridors, lifts, canteen, front of the washrooms and and staircases. There must be a control room from where well experienced staff members can control the angle and aperture of the cameras. They must be an expert in this field to give you an excellent service.
Where to Buy CCTV Cameras
CCTV cameras can be purchased from electronic stores. The online sites also display images of various types. The prices will vary with different models and brands. The price of these cameras goes easy on your pockets.
So get hold of a technician as soon as possible to set up these hidden cameras at your office. These will keep a record of the events of the entire day and can be seen later on if required.
After all your own safety is in your own hands.
JVC ships GY-HM600 HD camera
JVC Professional Products Company is
now shipping the GY-HM600, its next-generation handheld ProHD camera.
Introduced earlier this year at the 2012 NAB Show, the new HD camera features a built-in 23X zoom lens and delivers superior low-light performance with excellent sensitivity (F11 at 2000 lux).
With a 1.22-megapixel color viewfinder and color 3.5in LCD, the GY-HM600 is versatile enough to handle tripod-based shots and run-and-gun situations. It is equipped with three, 1/3in 12-bit CMOS sensors, each with 1920 x 1080 pixels. The built-in Fujinon HD lens features a wide focal range of 29mm-667mm (35mm equivalent) and has manual focus, zoom and iris rings, along with three ND filters. Other features include autofocus with face detection and an optical image stabilizer.
The
lightweight camera records HD or SD footage in multiple file formats,
including native XDCAM EX (.MP4), Final Cut Pro (.MOV) and AVCHD, to
nonproprietary SDHC or SDXC media cards. In addition to relay mode for
uninterrupted recording, the GY-HM600 allows simultaneous recording to
both memory cards for instant backup or client copy. Plus, the Pre Rec
(retro cache) feature continuously records and stores up to 20 seconds
of footage in cache memory to help prevent missed shots of breaking
events.
Equipped with a LANC-based remote connector and compatible with JVC's
ProHD Compact Studio 7in monitor, the GY-HM600 can be used for an
affordable studio system. The camera also includes a timecode
synchronization input as well as HD-SDI and HDMI outputs. A built-in
stereo microphone is ideal for capturing natural sound, but the GY-HM600
also includes two XLR inputs with phantom power, shotgun mic holder,
headphone jack and additional input for a wireless mic receiver.
Another new ProHD camera, the GY-HM650, will be available this winter. Specifically designed for mobile newsgathering, it has similar specs to the GY-HM600 but includes built-in FTP and Wi-Fi connectivity. With its dual codecs, it simultaneously produces full HD files and smaller, Web-friendly files that can be delivered to a station without a microwave or satellite connection.
With a 1.22-megapixel color viewfinder and color 3.5in LCD, the GY-HM600 is versatile enough to handle tripod-based shots and run-and-gun situations. It is equipped with three, 1/3in 12-bit CMOS sensors, each with 1920 x 1080 pixels. The built-in Fujinon HD lens features a wide focal range of 29mm-667mm (35mm equivalent) and has manual focus, zoom and iris rings, along with three ND filters. Other features include autofocus with face detection and an optical image stabilizer.
The JVC GY-HM600 features a 23X zoom lens and low-light performance of F11 at 2000 lux.
Another new ProHD camera, the GY-HM650, will be available this winter. Specifically designed for mobile newsgathering, it has similar specs to the GY-HM600 but includes built-in FTP and Wi-Fi connectivity. With its dual codecs, it simultaneously produces full HD files and smaller, Web-friendly files that can be delivered to a station without a microwave or satellite connection.
Samsung ST150F Camera
Samsung ST150F Camera Features:
Samsung ST150F Digital Camera Technical Specifications:
- 16.2MP CCD Camera
- 3.0″ LCD Display
- 5x Optical Zoom
- 25mm Wide Angle
- 720p HD Video
- Wi-Fi Connectivity
- Available In Four Colors
Samsung ST150F Digital Camera Technical Specifications:
- 3.0″ QVGA TFT LCD Screen
- Sensor Type: 1/2.3″ CCD
- Effective Pixels: 16.2 Mega Pixels
- Optical Zoom: 5x
- Aperture Range: f2.5(W)-6.3(T)
- Image Stabilization: Digital Image
- ISO Sensitivity: Auto, 100-3200
- Image Format: JPEG
- Movie Format: MPEG-4, H.264
- External Media: SD/SDHC/SDXC
- Connectivity: Video Out
- Dimensions: 94.4 x 57.95 x 17.7 mm
- Weight: 114 gm
Panasonic LUMIX DMC-LZ20 Camera
Panasonic LUMIX DMC-LZ20 Camera Features:
Panasonic DMC-LZ20 Camera Technical Specifications:
- 3.0″ Inch LCD Screen
- 16.4MP CCD Camera
- 21x Optical Zoom
- Built In Flash
- Manual Exposure
- Intelligent Auto Mode
- 25mm Ultra Wide Angle
- 720p HD Video Recording
Panasonic DMC-LZ20 Camera Technical Specifications:
- Monitor: 3.0″ Inch TFT Screen LCD Display (460K Dots), Field Of View: Approx. 100%, Auto Power LCD Mode, Power LCD Mode, High-Angle Mode
- Effective Pixels: 16.4 Mega Pixels
- Total Pixels: 17.5 Mega Pixels
- Sensor Size/Filter: 1/2.33-inch CCD Sensor/Primary Color Filter
- Lens: 12 Elements In 9 Groups, (3 Aspherical Lenses/5 Aspherical Surfaces)
- Digital Zoom: 4x
- Optical Zoom: 21x
- Intelligent Zoom: 48x
- Extra Optical Zoom (EZ): 26.5x (4:3/10M), 37.8x (4:3/5M), 48.5x (4:3/Under 3M)
- Aperture: F3.1 – 5.8/2-step (F3.1/8.9 (W), F5.8/16.7 (T))
- Focal Length: f = 4.5-94.5 mm (25-525 mm in 35 mm equiv.), (27-567 mm in 35 mm equiv. in video recording)
- White Balance: Auto/Daylight/Cloudy/Shade/Incandescent/White Set
- Focus Mode: Normal/AF Macro/Zoom Macro, Continuous AF, AF Tracking
- Exposure Compensation: 1/3 EV step, ±3 EV
- Exposure Metering: Program AE, Manual
- AF Metering: Face/AF Tracking/1-area/9-area/Spot
- Movie Format: QuickTime Motion JPEG
- Still Image: JPEG (DCF/Exif 2.3)
- Microphone/Speaker: Mono/Mono
- Optical Image Stabilizer: O.I.S. (On/Off)
- ISO Sensitivity: Auto/100/200/400/800/1600, High Sensitivity Mode (ISO 1600-6400)
- Self Timer: 2 sec/10 sec
- Shutter Speed: Approx. 15-1/2,000 sec
- External Media: SD/SDHC/SDXC
- Internal Storage: Approx. 109MB
- Interface: AV Out, USB v2.0
- Alkaline AA/Ni-MH Battery
- Battery Life: Approx. 380 Pictures
- Dimensions: 119.1 x 76.5 x 79.8 mm
- Weight: 499 gm
Fujifilm finepix xp 200
- Waterproof to depth of 50ft(15m), Shockproof to height of 6.6ft(2m), Freezeproof to 14°F(-10°C), and Dustproof
- Wireless Image Transfer
- Versatile Shooting Mode
- Bright and Clear LCD with an Anti-Reflective Coating
- Full HD Movie (1080i/60fps)
- Burst Mode Button” for Responsive, Hassle-Free Shooting
- High-Resolution, 16M CMOS Sensor and Optical Image Stabilization
- Colors: Yellow, Black, Blue, Red
- Image Sensor: 1/2.3-inch CMOS with primary color filter
- LCD Screen Size: 3.0-inch, approx. 920K-dot, TFT color LCD monitor, approx. 100% coverage
- Effective Pixels: 16.4 million pixels
- Digital Zoom: 2.0x (Up to approx. 10x)
- Optical Zoom: 5x
- Aperture Range: F3.9 / F6.2 (Wide), F4.9 / F8.0 (Telephoto)
- Lens: Fujinon 5x optical zoom lens
- Focal Length: f=5.0mm – 25.0mm, equivalent to 28 – 140mm on a 35mm format
- Focus Distance: Wide : Approx. 60cm to infinity/2.0ft to infinity, Telephoto : Approx. 1.0m to infinity/3.3ft to infinity
- Shutter Speed: (Auto mode) 1/4sec. to 1/2000sec., (All other modes) 4sec. to 1/2000sec
- Image Stabilization: Optical Image Stabilization (CMOS shift type)
- Self-timer: Approx. 10sec. / 2sec. delay, Group Timer
- Movie Format: 1920 x 1080pixels (60 fps) / 1280 x 720pixels (60 fps) / 640 x 480pixels (30 fps) with stereo sound
- Storage Media: SD / SDHC / SDXC (UHS-I) memory card
- Sensitivity: Auto, ISO 100 / 200 / 400 / 800 / 1600 / 3200 / 6400* (Standard Output Sensitivity)
- Ports: USB 2.0 High-Speed, HDMI mini connector
- Battery: Li-ion NP-50 (included)
- Dimensions: 116.1mm x 71.4mm x 30.3 mm
- Weight: Approx. 232 gm
Buy online diamond
Ever wondered what will happen if jewellery shopping is made online,
ladies choosing and buying jewellery using a computer instead of making
men spend whole day(s) standing in a shopping mall. This is where the
future is .. Visit Caratlane.com this i think is probably the first
portal in india focussed towards online sales of diamonds jewellery,
they say that they are gonna change the way indians buy jewellery.
“CaratLane is an online Diamond and Diamond Jewellery Portal that aims
to change the way Indians buy diamonds and diamond jewellery”
Nikon Camera
Gifted myself with a new camera, a couple of weeks ago, so was busy
researching on it. This is a Nikon 3000, it came with a 18-55mm Kit
lens, Kit bag, 4 Gb mem card, etc.. .
The Camera as such is excellent with a wide range of enhancements, the zoom is the only thing that hurts. I certainly do know the metrics behind zoom lenses in SLR cameras, but having got used to a superzoom (FujiFilm S5700) for more than a year, I find this very hard to get used to. But if you go to a store and check the price of those super zoom lenses for SLR’s you wont think about them.
Here are some of the snaps taken with the new camera
The Camera as such is excellent with a wide range of enhancements, the zoom is the only thing that hurts. I certainly do know the metrics behind zoom lenses in SLR cameras, but having got used to a superzoom (FujiFilm S5700) for more than a year, I find this very hard to get used to. But if you go to a store and check the price of those super zoom lenses for SLR’s you wont think about them.
Here are some of the snaps taken with the new camera
Palm Island in Dubai
Environmental Impacts
The construction of the Palm Islands and The World, for all
Nakheel’s attempts to do otherwise, have had a clear and significant
impact on the surrounding environment. It would be impossible to
introduce a change of such magnitude to an established ecosystem and not
anticipate any negative changes or reactions in the area’s wildlife and
natural processes. The construction of the various islands off the
coast of Dubai has resulted in changes in area wildlife, coastal erosion
and alongshore sediment transport, and wave patterns. Sediment stirred
up by construction has suffocated and injured local marine fauna and
reduced the amount of sunlight filtered down to seashore vegetation.
Variations in alongshore sediment transport have resulted in changes in
erosion patterns along the UAE coast, which has also been exacerbated by
altered wave patterns as the waters of the Gulf attempt to move around
the new obstruction of the islands. Not surprisingly, Dubai’s
megaprojects have become a favourite cause of environmentalists.
Greenpeace has criticized the Palm Islands’ complete and utter lack of
sustainability, and Mongabay.com, a site dedicated to rain forest
conservation, has attacked Dubai’s artificial islands aggressively,
stating that:
Near shore Wave Measurements 1,200 kHz ADCPs with pressure sensor have been stationed at a near shore position north of Jebel Ali Port in 6 m water depth and off the Jumeirah Public Beaches, providing directional wave information in the region of the most immediate interest to the Municipality. “The instrument measures currents throughout the water column using the return echo of an acoustic signal transmitted by the instrument. The instrument not only provides valuable information to the Municipality, but also to the general public via internet. A pressure sensor was also installed behind the northern arm of the T breakwater to provide information on water levels within the sheltered embayment. Variations in water depth (pressure head) induce corresponding resistivity readings in a piezo-electric device in the instrument. The value of resistance measured is proportional to the depth of water. The data reveals a lot about coastal hydrodynamic processes occurring along the coast, to calibrate or verify hydrodynamic models as well as to assess bather safety concerns.” Video Monitoring On the thirty-fourth floor of the Burj Al Arab hotel, which is located offshore on the Dubai coastline are two installed video cameras that take time-lapse snapshots of beaches using GPS corrected control points. Once the images are processed, and control points are established, a representative water line is determined. So far data from the video cameras have just been used for verification purposes to measure the accuracy of extracted water levels from images to real survey data. However, now these images will be used in designing profile dynamics and exploring bar dynamics and the extraction of near shore current patterns using cross-image correlation. Meteorological Data There is a a meteorological station at Jumeirah Open Beach that helps provide information on wind speed and direction, barometric pressure and air temperature. The station is run by EmuDome Dubai Environmental Monitoring System (EDEMS), a custom built software package. EDEMS allows easy access to transfer of this useful information between a client and project team via internet. Sediment Sampling Sediment Samples are collected along all of Dubai’s beaches and near shore zone and are analyzed according to grain size, fall velocity, allowing scientists to make many conclusions about the coastline evolution, sediment transport and morphological models set up for the region. Coastal Monitoring of the Palm Island Area The construction of the artificial islands have altered the Dubai coastline. For instance, the construction of Palm Jumeirah has caused the coastline in the southwest shadow of the island to grow very quickly. Wave models reveal that the northerly waves are removed from the near shore wave regime at Mina Al Seyahi through the existence of the Palm island. With this removal, north-eastward transport rate is greater and as a result, there is a build-up of the coastline. However, on the other side of Palm island, the reverse occurred. The coastline here had been retreating because the harbour blocked movements of sediments travelling from the southwest and the north easterly transport had gradually eroded the beach. With the removal of waves from the north-west by the construction of Palm Island, Northerly waves “become” relatively stronger. Thus, the reverse effect is obtained here, resulting in lots of erosion (an illustration and more basic analysis of this phenomenon can be found on the Construction of Palm Islands page).
“significant changes in the maritime environment [of Dubai] are leaving a visual scar [. . .] As a result of the dredging and re depositing of sand for the construction of the islands, the typically crystalline waters of the gulf of Dubai have become severely clouded with silt. Construction activity is damaging the marine habitat, burying coral reefs, oyster beds and subterranean fields of sea grass, threatening local marine species as well as other species dependent on them for food. Oyster beds have been covered in as much as two inches of sediment, while above the water, beaches are eroding with the disruption of natural currents” (“Dubai’s artificial islands have high environmental cost”).Despite other criticisms of Dubai, there is a significant amount of truth in Mongabay.com’s statements. The World Wildlife Fund made a similar announcement in 2006, declaring “UAE’s human pressure on global ecosystems (its ecological footprint) to be the highest in the world. The country is currently five times [in 2007] more unsustainable than any other country” (. It would be impossible to say that the effects of the islands have not been felt by the surrounding environment since the start of their construction, and will not continue to be felt into the future. So in order to properly manage their shorelines and effects, Dubai relies on its very comprehensive coastal monitoring programme. Established in 1997, the Dubai coastal monitoring programme began studying the baseline bathymetric and topographic survey of the Jumeirah coastline. However, since then better technology and more additional data was able to be collected, including remote video monitoring of Dubai beaches, sediment sampling and analysis, near shore directional wave and current recordings and intensive measurement exercises at selected locations using Acoustic Doppler Current Profiler (ADCP) equipment. Below is a breakdown of those methodologies of monitoring and what they survey and measure. Bathymetric and Topographic Surveys First, the Dubai coastal zone has been divided into different regions for more organized monitoring. The frequency of the surveys in a region is determined by the environmental risks that the particular region poses. For instance, areas more affected by coastal erosion or inundation are monitored more than those that are less likely to not be affected. The bathymetric survey covers a 500m wide band along the entire coastline with survey lines that run perpendicular to the coast, 25 m apart from each other. A dual frequency echo sounder and differential GPS are used to collect data along these lines. Some of the data obtained deal with sediment budget and transport systems. Topographic surveys are carried out using a pre-defined set of profiles that run perpendicular to the shoreline down to mean water level +1.13m DMD (Dubai Municipality Datum). Scatter point surveys are also completed at 10 locations along the coast to produce a contour map of the beach. Data is also collected by Real-Time Kinematic Geographical Positioning Systems (RTK GPS).
Near shore Wave Measurements 1,200 kHz ADCPs with pressure sensor have been stationed at a near shore position north of Jebel Ali Port in 6 m water depth and off the Jumeirah Public Beaches, providing directional wave information in the region of the most immediate interest to the Municipality. “The instrument measures currents throughout the water column using the return echo of an acoustic signal transmitted by the instrument. The instrument not only provides valuable information to the Municipality, but also to the general public via internet. A pressure sensor was also installed behind the northern arm of the T breakwater to provide information on water levels within the sheltered embayment. Variations in water depth (pressure head) induce corresponding resistivity readings in a piezo-electric device in the instrument. The value of resistance measured is proportional to the depth of water. The data reveals a lot about coastal hydrodynamic processes occurring along the coast, to calibrate or verify hydrodynamic models as well as to assess bather safety concerns.” Video Monitoring On the thirty-fourth floor of the Burj Al Arab hotel, which is located offshore on the Dubai coastline are two installed video cameras that take time-lapse snapshots of beaches using GPS corrected control points. Once the images are processed, and control points are established, a representative water line is determined. So far data from the video cameras have just been used for verification purposes to measure the accuracy of extracted water levels from images to real survey data. However, now these images will be used in designing profile dynamics and exploring bar dynamics and the extraction of near shore current patterns using cross-image correlation. Meteorological Data There is a a meteorological station at Jumeirah Open Beach that helps provide information on wind speed and direction, barometric pressure and air temperature. The station is run by EmuDome Dubai Environmental Monitoring System (EDEMS), a custom built software package. EDEMS allows easy access to transfer of this useful information between a client and project team via internet. Sediment Sampling Sediment Samples are collected along all of Dubai’s beaches and near shore zone and are analyzed according to grain size, fall velocity, allowing scientists to make many conclusions about the coastline evolution, sediment transport and morphological models set up for the region. Coastal Monitoring of the Palm Island Area The construction of the artificial islands have altered the Dubai coastline. For instance, the construction of Palm Jumeirah has caused the coastline in the southwest shadow of the island to grow very quickly. Wave models reveal that the northerly waves are removed from the near shore wave regime at Mina Al Seyahi through the existence of the Palm island. With this removal, north-eastward transport rate is greater and as a result, there is a build-up of the coastline. However, on the other side of Palm island, the reverse occurred. The coastline here had been retreating because the harbour blocked movements of sediments travelling from the southwest and the north easterly transport had gradually eroded the beach. With the removal of waves from the north-west by the construction of Palm Island, Northerly waves “become” relatively stronger. Thus, the reverse effect is obtained here, resulting in lots of erosion (an illustration and more basic analysis of this phenomenon can be found on the Construction of Palm Islands page).
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