Latest Contributions by larryzhang1

... The  "nad83_with_subset_of_images" image shows how the change (switching to a nad83 datum in the EO) affected the subset (about 10) images.  The "nad83_with_all_images" image shows how the change did not have the same effect on the complete dataset.  It is slightly different than before I switched to NAD83, but it isn't helping as much as it did with the smaller subset of images.  Does that mean anything? I'm also seeing that in ArcMap, when I zoom in more, the alignment gets better.  It seems to change the images it is selecting.  I don't see similar behavior in the deployed service (as a WMS), so I'm not sure what that means. [ATTACH=CONFIG]24990[/ATTACH]   [ATTACH=CONFIG]24991[/ATTACH] david, same as you and not sure why�?� 1. Two scenes have different datum from others (NAD83)? (It shouldn�??t be, because all are done in one project�?�); 2. Two scenes have real displacement against adjacent images. (Most likely �?�) 3. �?� Honestly, your issue is really attractive to me.  Indeed, �??Direct Georeferencing�?? products look easy and simple to many end users; but, many practices show that it is intensive cooperation and detail-oriented mission�?� Pls share, when you get it solved. ... View more

Try the Split Raster tool. It doesn't take in a polygon file, but there are a lot of parameters that should get you what you want. And it takes a raster dataset or a mosaic dataset as input. This tool was put in at 10.0. Thanks, melanie, Regardless of no proper naming mechanism on a feature 'Field' text, the tools 'Clip' and 'Split' look some issues, when exporting on larger MD or image service from larger MD, with 'Overviews'. Not sure why? With Clip, it works under desired AOI window extent; but the renderer, histogram, etc. of the exported images are changed or lost during exporting... In other word, the exported images are BLACK, so that the histogram must be applied manually... Or not working in the desired AOI (Split), when image service is very larger. Thanks for assistance. +++++++++++ The major reason to request is: With this automation tool, imagery guys can allow 'authorized' customers (GIS, engineers, geoscientists, etc.) effectively to �??Export rasters as batch in ArcMap�?? from image services with Overviews by their own, which can be based on the predefined SHP. With this SHP, usually, each polygon has a text field containing something like �??GE13_May20_2433128_0000000�?? or  �??LS8_Jan18_****�??, etc., which is mostly derived from individual 'time-serial' MD footprints for customers conveniently to use for �??Export rasters as a batch�?? automatically. Right now, we have to intensively involve in this simple mission in operation. ... View more

... to run the IMU data through Applanix POSPac MMS after the flight, generate an external orientation file, and use that as input to the orthorectification process.  We have not been using tie points or gcp.  Is there a way to specify tie points in ArcMap? ... David, On your description, most likely, something more should be done, to refine this model during running the package of Trimble �??APPLANIX POSPac MMS�??, which may include the QA/QC processes such as with �??Applanix SmartBase module�?? to check �??Bad reference station data? Bad antenna heights? Bad reference station coordinates?...�?? Generally, this can be done quickly and easily by using a few overlapping images from each mission and checking the system calibration parameters using the automatic point matching and bundle adjustment. This ensures you achieve the highest quality results each and every mission. Please check with the expert on this Trimble system and its package to help solve the model, as the best choice. Not sure if PCI GI supports the camera type that you are using in IMU. Better to check with PCI. (If Trimple APPLANIX DSS used, perfect). If yes, the GI tool will most easily fix the model 'RPDef' directly with TP for your case, if licensed. However, as a backup, as said earlier, you can remove those mis-alignment images from the model �??RPDef�??, and then perform the refinement with TP in ArcMap (�??GeoReferencing�??). After satisfied with the quality,  add those �??geo-corrected�?? images back to MD via Raster Type: �??Raster Dataset�??, which is combined with previously Raster Type: �??RPDef�??, for orthorectification in MD together �?� Good luck, larry @ ARAMCO +++++++++++++ Personally, the system calibration was done not perfectly. In fact, unlike Aerial Triangulation, Direct Georeferencing relies on the system calibration and direct EO to be accurate in order to achieve the final ground accuracy. While the calibration of mapping cameras is stable, changes can occur over time due to a number of factors such as handling and age. Ongoing quality assurance and control of the calibrations parameters is hence crucial for success. ... View more

Hello, ... quite a few mis-alignments.  ... The image service uses and rpdef file to define camera interior orientation, and the image exterior orientation parameters are in a dbf that reference the rpdef file.  .... [ATTACH=CONFIG]24920[/ATTACH] [ATTACH=CONFIG]24921[/ATTACH] David, It looks that the model �??RAW to RPDef�?? should be re-done in PCI GI Tools firstly. You should combine GCP & TP with RPC to refine this model, at least, a few of TP (Tie Points) for your case. After rewriting �??RPDefs�?? from GI, orthorectification can be done again with DEM within MD. ++++++++++ If GI tool not accessible (or not licensed), it is advisable to remove those mis-alignment images from the model 'RPDef'; and then use the tool �??Georeferencing�?? of ArcGIS to refine with TPs. ... View more

Firstly, it looks that your license of ECW plug-in is not properly setup. Secondly, it is not good idea to directly server ECW files in ArcGIS Server (ECW mainly optimized in ERDAS Apollo). Anyhow, in addition to Peter's two solutions to addess this ECW issue, my practice is added for additional reference. Generally, if having image extension for ArcGIS Server licensed, it is logical to load ECW files into MD first, and then serve as image service. In fact, we have managed many historical ECW files (mainly before 2006) into time-serial MD directly. Just pay some attentions here; for example, to clean the boundary around the ECW in MD, and then analyze. Also, advisable to create and build overviews for visibility at lower scales (not only for better performance). Arguable on this aspect with ESRI advices !!! �?� So far, we have no problem to successfully create and publish MD containing ECW files. Please share new findings, if any�?� Good Luck! +++++++++ Keep in mind that ECW is just one of raster formats (TIFF, IMG, JP2, ECW, ERS, MrSID, etc).  GDAL supports .ecw format for read access and write. Link at  http://www.gdal.org/frmt_ecw.html If having ECW plug-in licensed, it is guaranteed that image service from MD containing ECW sources can be drawing properly at higher scales or full resolution. Also don�??t be confused by the documentation at http://resources.arcgis.com/en/help/main/10.1/index.html#//00sq000000mr000000 ... View more

Larry The SECOND link you posted (http://bit.ly/Z7kbNC) goes to a Group on ArcGIS Online where you should find downloadable items related to the ArcGIS Image Management Workflows.  There are currently 3 items, but more will appear in the future.  There is a downloadable ZIP file that contains the �??MDCS�?? script - I'll include a direct link HERE. I suspect that the reason you did not find these items is that ArcGIS Online has a setting for "Show: Web Content Only" that you would need to change to "Show: All Content".  See this screenshot: [ATTACH=CONFIG]24116[/ATTACH] The FIRST link you posted (http://bit.ly/Owa2D6 ) leads to the ArcGIS Online Group that shows example live image services for worldwide elevation data.  This group is different, and you will have to JOIN the group before you will be able to see the items.  After logging in using your Esri Global ID, click on the gray "Join this Group" button to send a request - you should be approved to join the group within 24 to 48 hours. [ATTACH=CONFIG]24117[/ATTACH] *NOTE - this group regarding live elevation services may be changing soon.  If the link above does not work, please try Searching for Groups, and enter "World Elevation Services". Please let me know if you still have problems or questions.  Thanks! Cody Benkelman Thanks a lot, Cody. The script is already available to me. Besides, it looks that the personal (public) account is not allowed to access "world elevation services". {The message shows: "Unable to apply to join this group. A Public Account cannot apply to join a group owned by an organization."] To me, this group owned by ESRI, do we have any other way to access? ... Regards, Larry @ Aramco ... View more

I have created a surface model using ArcCatalog: I converted an LAS dataset into a raster.  I created a 3D hillshade from the raster  and float the hillshade over the raster data in ArcScene 10.1.  When I view the same raster in Surfer 10 as a 3D surface I get a very different view. Is there a way to recreate the Surfer view in ArcScene? Good idea to try in ArcMap (rather than ArcScene). Firstly, advisable to build statistics on imported LAS data, before adding ArcGIS. Secondly, with 3D Viewer (enhanced for LAS datasets) in LAS Dataset tool, you will be able to get the same 3D effect, as Surfer (maybe, required to play with varied values of Z Exaggeration). Please share your findings, if any different. ... View more

For ESRI 3D web solutions, we have also been waiting for it for a while. ... However, you can get some updates on its development with this trend. Please link to the following: 1. http://video.arcgis.com/watch/2386/building-3d-web-applications-with-arcgis 2. http://video.arcgis.com/watch/2386/building-3d-web-applications-with-arcgis Regards, Larry @ ARAMCO +++++++++++++++ By the way, you can browse the distinc 3D web solution from SuperMap. The 3D demo video is available at https://www.dropbox.com/s/sykdcwow7egs9hb/3D_Demo.mp4 Also, Baidu launched the real 3D GIS map for Beijing city. Firstly link to http://map.baidu.com/ And then select 'Beijing' (�??京) with 3D (�?维) at the top right corner. Personally, both are wonderful! ... View more

...  thumbnails are only compressed RGB rendering of the imagery to which not analysis etc can be performed. They are only used in aspects such as metadata and not drawn directly to the map as one can not apply different enhancements, band combination etc. ... Thanks Peter. As part of effective communications with you and raster team, I make more personal comments below: If thumbnails in ESRI implementation are referred to raster images in Footprint field 'Raster', what we need is different, for sure. Personally, it is worth to further study how to effectively present �??thumbnails within footprints�?? for (the purpose of) raster management, in addition to current implementation of MD in 10.0/10.1. In practice, when customers use thumbnails within footprint to manage raster images (including major metadata and path info), they have many reasons. For example, they may NOT need 'real' raster images for any analysis or image processing, or just apply those thumbnails (visible, when enabled) within footprint into applications, including web application as map service and Google Earth Enterprise. In this case, the footprints with �??visible�?? thumbnails should be functional, when enabled. Sometimes (if not mostly), customers may require the footprints with thumbnails (visible) to be exported �??as a whole�?? from MD into distinct FGDB for other applications... With 10.2 or later SP1, anyhow, we hope that those kinds of simple capability will be considered. ++++++++ By the way, as one of appreciations (not always complains),  please link to my latest post at http://forums.arcgis.com/threads/84467-LAS-standard-and-ESRI-LAS-Dataset. Certainly, ESRI LAS Dataset is really helpful to deal with 3D images and rasters. For sure, raster team made huge contributions to this good tool. Thanks ++++++++ PS, In fact, we are also using MD (10.1) to manage �??real�?? raster images (RAW) over network for �??dynamic�?? image processing and analysis, which are remotely conducted by ESRI ArcGIS or ENVI (ENVI for ArcGIS Server, ENVI services engine), but only for small-area non-engineering (high-resolution like GEOEYE) or large-area (low-resolution like LANDSAT) imagery projects. As talked in other posts, one of the reasons we do this way is that GCPs still couldn't be 'directly' combined into MD, in addition to limitations of color enhancement in MD (plus, the invisible issue of �??thumbnails with footprints�??). In operation, it is not good idea to use the MinPS and MaxPS in MD to control the visibility of raster images at low scales, because of the perfornance concern. Honestly, it is still not practicable and unproductive to completely combine the tools 'Georeferencing' and  �??Image Analysis�?? inside MD 10.1 for imagery processing (maybe, arguable)! Of course, we have done a large and nationalwide project of SPOT5, which was making use of some good capabilities in MD 10.1, including seamline creation with Edge Detection algorithm. But, all those images are pan-sharpened / color-balanced by Erdas & ER Mapper and spatially rectified by 'Georeferencing', before adding into MD10.1. ... View more

Mosaic Dataset do support these features. You can have the system generate thumbnails for all images in a mosaic dataset. The REST APIs enable one to access these and do a wide range of structured queries to return appropriate imagery and footprints. Different applications have been created to make use of this capability. Thanks for nice reply, Peter We did try this option (Build Thumbnails in Mosaic Dataset).  For unknown reasons, we couldn�??t get it working as expected, including within MD and image services. Besides, thumbnails in footprint should be visible (in fact, NOT), once MD (without overviews) is served as map service, when needed. Note that in 10.2 there is also an image indexing search capability added to ArcGIS Desktop. This enables catalog to search and index images on different local and network drives as well as mosaic datasets and items within mosaic datasets. Through the standard ArcGIS desktop search tools you can then search and find image and raster datasets based on location and a wide range of attributes. The system not only reads the images, but interprets the various metadata such as cloud cover, sun angle etc that are part of the wide range of different metadata standards. Nice! Looking forward to it. ++++++++++++++ Honestly, we are still learning how to effectively use thumbnails with footprints in variant applications, which is mainly for the purposes of raster management, in particular, metadata and path info, when dealing with RPC-based GeoEye, QuickBird, Pleiades and SPOT 6. So far, it looks that ENVI Katalog presents much easy and more efficient way to do so. (Only issues with ENVI Katalog are: Not RPC-based imagery loading, and NOT Building footprints, at least, by DN - Radiometry). ... View more