Baseline coastal oblique aerial photographs collected from Navarre Beach, Florida, to Breton Island, Louisiana, September 18–19, 2015

The U.S. Geological Survey (USGS) conducts baseline and storm-response photography missions to document and understand the changes in vulnerability of the Nation's coasts to extreme storms. On September 18–19, 2015, the USGS conducted an oblique aerial photographic survey from Navarre Beach, Florida, to Breton Island, Louisiana (fig. 1, http://pubs.usgs.gov/ds/1008/downloads/maps/index.jpg), aboard a Maule MT57 aircraft at an altitude of 500 feet (ft) and approximately 1,200 ft offshore (fig. 2, http://pubs.usgs.gov/ds/1008/html/ds1008_fig2.html). This mission was conducted to collect data for assessing incremental changes since the last survey, which was flown September 2014 (http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-326-FA) and can be used for assessing future coastal change. The photographs provided are Joint Photographic Experts Group (JPEG) images. The photograph locations are estimates of aircraft positions and do not indicate the location of the feature in the images (See the Navigation Data page, http://pubs.usgs.gov/ds/1008/html/ds1008_nav.html). These photographs document the configuration of the barrier islands and other coastal features at the time of the survey. ExifTool was used to add the following to the header of each photo: time of collection, Global Positioning System (GPS) latitude, GPS longitude, keywords, credit, artist (photographer), caption, copyright, and contact information. Photographs can be opened with any JPEG-compatible image viewer by clicking on a thumbnail on the contact sheet. All image times are recorded in Coordinated Universal Time (UTC). Table 1 (http://pubs.usgs.gov/ds/1008/html/ds1008_table.html) provides detailed information about the assigned location, name, date, and time the photograph was taken along with links to the photograph. In addition to the photographs, a Google Earth Keyhole Markup Language (KML) file is provided and can be used to view the images by clicking on the marker and then on the thumbnail or the link above the thumbnail. The KML files were created using the photographic navigation files. Note: A KML number was assigned to each photograph to aid in navigation of the Google Earth file. These numbers correspond to the site labels in Google Earth.

美国地质调查局（U.S. Geological Survey, USGS）会开展基线与风暴响应摄影任务，以记录并理解美国海岸面对极端风暴时的脆弱性变化。2015年9月18日至19日，USGS搭乘莫勒MT57（Maule MT57）型航空器，在飞行高度500英尺、离岸约1200英尺的条件下，从佛罗里达州纳瓦拉海滩至路易斯安那州布雷顿岛开展了斜向航空摄影测量（见图1，http://pubs.usgs.gov/ds/1008/downloads/maps/index.jpg），详情见图2（http://pubs.usgs.gov/ds/1008/html/ds1008_fig2.html）。本次任务旨在收集数据，以评估自2014年9月最后一次航空测量（相关链接：http://cmgds.marine.usgs.gov/fan_info.php?fan=2014-326-FA）以来的渐进式变化，所得数据可用于后续海岸变化评估。本次提供的影像为联合图像专家小组（Joint Photographic Experts Group, JPEG）格式图像。照片拍摄位置仅为航空器位置的估算值，无法代表影像中地物的实际位置（详见导航数据页面：http://pubs.usgs.gov/ds/1008/html/ds1008_nav.html）。这些照片记录了本次测量时段内障壁岛及其他海岸地貌的形态。研究人员使用ExifTool为每张照片的文件头添加了如下信息：拍摄时间、全球定位系统（Global Positioning System, GPS）纬度、GPS经度、关键词、署名、创作者（摄影师）、说明、版权及联系方式。用户可通过点击联系表上的缩略图，使用任意支持JPEG格式的图像查看器打开照片。所有图像时间均采用协调世界时（Coordinated Universal Time, UTC）记录。表1（http://pubs.usgs.gov/ds/1008/html/ds1008_table.html）提供了每张照片的指定位置、名称、拍摄日期与时间的详细信息，同时附带照片链接。除照片外，本次数据集还提供了谷歌地球密钥标记语言（Google Earth Keyhole Markup Language, KML）文件，用户可通过点击标记后再点击缩略图或缩略图上方的链接，在谷歌地球中查看影像。该KML文件基于摄影导航文件生成。注：为便于在谷歌地球文件中导航，每张照片均分配了KML编号，该编号与谷歌地球中的站点标签一一对应。