Latest Contributions by larryzhang

‎03-31-2013

Improve multipatch model and memory management for ArcScene; and implement interoperation between ArcScene and major 3D subsurface models like GoCAD, Petrel, etc.

‎03-25-2013

James, Pls try the following recommendations: [1] The Mosaic Dataset, which will manage all 684 TIFFs from the file system over network (or local SAN), should be created with overviews in FGDB together;[INDENT] The creation of Overviews associated with Mosaic Dataset in FGDB is mainly for better performance. Certainly, if the display performance is not your big concern (saying, it may be because of small raster datasets in your MD), the attribute �??MaxPS�?? in the Footprint can be increased to very large value from the default, so that all raster images are able to display at all scales in MD. At this case, it is surely not necessary to create Overviews at all (if that is your case, you can also manage Mosaic Dataset via Oracle /ArcSDE). Of course, on our practice, the creation of the overviews in MD is highly desirable. [/INDENT] [2] It is not dad idea to use the combination of �??attribute�?? table in SDE and Mosaic Dataset with overviews in FGDB. But, the Mosaic Dataset �??footprint�?? should have a common field with �??attribute�?? table in SDE;[INDENT] However,the mosaic dataset model and FGDB in 10.1 provides more flexibility to manage attributes via �??Footprint�??. If your image services with attributes will be only used (view , query, analysis) in ESRI applications like ArcGIS, it is good idea to manage all attributes via Mosaic Dataset Footprint in FGDB directly. Here, personally, for ESRI, it is advisable to release restrictions on (or improve) �??query�?? capability via FGDB in the future's release of Mosaic Dataset model, which should allow to access/ query attributes of image services over Online Web Services, even other applications like Google Earth (Enterprise).[/INDENT] [3] On ESRI documentation, the creation of both pyramids and statistics on each raster image (even mosaic dataset) are recommended for performance (and color balance, when dealing with �??sensor-based�?? RAW images). On our practice, however, the mosaic dataset with overviews must be created; [4] On your case, the following parameters can be used for 'Define Overviews': (a) pixel size - 0.5; (b) number of levels �?? 5 or 7....[INDENT] If not desirable as expected, you can also try to check the option �??Force Overviews Tiles�?�. Note, the 'derived' overviews with this do not meet our expectations mostly , but maybe OK to you. [/INDENT] Hope helpful!

‎03-24-2013

James, The question is not basic; in fact, it represents some of confusions that also we are facing in practice. Here we would like to share a few of hands-on experience for reference, which is based on our last 3-year operational practice with the Mosaic Dataset model: Firstly, as new raster model, the Mosaic Dataset can be efficiently used in practice to manage mostly �??pre-processed�?? rasters as image service via FGDB to meet operational needs, even though FGDB still is not SMART enough right now. Secondly, for small project, the Raster Dataset model can be used to manage raster images and then served as image service. However, if containing raster images is going to larger (saying, 100 GB or more), the Raster Dataset model should not be used, because it fundamentally �??mosaic�?? all those individual raster images during loading, so that it takes very long time to do, in addition to �??limited�?? raster function capability, compared to the Mosaic Dataset model. Thirdly, on direct cache on �??larger�?? image service in 10.1 (including via ArcSDE/Oracle), it still is questionable in practice. We expect that ArcGIS Server and Raster teams should investigate it and see if to improve this algorithm as #1 priority �?� (For more at http://forums.arcgis.com/threads/66996-Caching-vs-Image-Service-performance-question?p=250278&viewfull=1#post250278 ). Regards, Larry @ Aramco +++++ Notes: Personally, users should not manage Mosaic Dataset with overviews still via ArcSDE/Oracle in practice, because it will create many potential headaches, in particular, dealing with massive rasters over network, in addition to the difficulty to 'UPDATE' image service and different security mechanisms between the Oracle/ArcSDE and file system... On directly managing 'sensor or camera-based' images within the Mosaic Dataset model, hopefully, it will take short time for ESRI to innovate and implement all major imagery processing algorithms, so that users will be able to effectively and directly process major �??sensor-based�?? satellite images to meet operational requirements. In other word, until now (10.1 SP1), users are still not able directly to handle 'sensor or camera-based' images properly because of lacking effective algorithms to deal with color enhancement and accuracy adjustment in Mosaic Dataset, including GeoEye-1, IKONOS-2, or SPOT-5. Of course, with an improvement within 10.1, users can do something more in the Mosaic Dataset model than 'pre-processed'. For details, read at http://forums.arcgis.com/threads/71343-From-imagery-processing-perspective-the-mosaic-dataset-model-(10.1)-works-eventually?p=252182&viewfull=1#post252182 .

‎02-03-2013

Hi, colleagues The pan-sharpening algorithm of Gram-Schmidt within Mosaic Dataset model 10.1 produces much better high-resolution clarity on color image against many other popular algorithms. As an example, for GeoEye-1, when zoom-in up to 1:500 (its full resolution roughly at 1:1800), it still can exhibit good clarity, which shows much clearer features (i.e., features not split at all). It looks really powerful and amazing. Personally, it will challenge the use of 20 ~ 30-cm resolution airphotos in practice. +++++++++++++++++ PS., On our practices, the pan-sharpening algorithm of Gram-Schmidt still makes unacceptable color recovery (not in nature) at most cases, so that it is really hard for Mosaic Dataset model to ???automatically??? adjust unbalanced colors among massive tiles, including the use of combination with the best algorithm ???Edge Detection???. Secondly, as a well-known issue, users have been also looking forward to more flexible capability 'inside' Mosaic Dataset model to ???directly??? deal with GCP (Ground Control Points) such as surveying, GIS references, and raster imagery references for spatial improvement. Finally, as an operational issue, users are eager to have an efficient ArcTool to automatically ???Export??? processed images from Mosaic Dataset ???as batch???, which is individually named on ???field' name of feature class.

‎01-01-2013

Happy New Year, Team, We need your assistance on the following scenario: We are taking action to migrate an existing �??Failover�?? system of ArcGIS Server 10.0 (SP5), which was constructed with two machine nodes (one is Active, another Passive) and managed by Windows Server 2008, into �??Failover�?? ArcGIS Server 10.1 (SP1). As first step, all installation and configuration at the �??Passive�?? node look fine. All services can be accessed via this host IP address. However, when we try to manage this �??ArcGIS Server 10.1�?? as EMP Cluster resource via �??EMP Cluster Group�?? manager in order to be accessible through the �??virtual�?? IP address at the Cluster, it failed. The error message show below:[INDENT]Service: ArcGIS Server (ArcGIS Server) Resource: Generic Service Parameters: Files\ArcGIS\Server\framework\etc\service\bin\ArcGISServer.exe Started 1/2/2013 8:13:57 AM Completed 1/2/2013 8:13:58 AM Creating the Generic Service resource. Do not use network name as computer name. An error occurred while creating the resource Generic Service. An error occurred while configuring the Generic Service resource. Unable to save property changes for 'ArcGIS Server'. The specified service does not exist as an installed service [/INDENT] It seems that ArcGIS Server 10.1 wouldn�??t support �??Failover�?? infrastructure anymore. If so, we have to restore ArcGIS Server 10.0 back. Isn�??t it correct? Any advices on 'Failover' to proceed with 10.1? Or do we have to construct a new infrastructure with �??load-balancing�?? solution for 10.1? All Best ++++++ Note, ArcGIS Server 10.0 (SP5) are very stable in �??Failover�??; For 'Failover Clusters' in Windows Server 2008 R2, link at http://technet.microsoft.com/en-us/library/ff182326(v=ws.10).aspx

‎01-01-2013

I am in the process of setting up an environment where there will be two web adaptors behind a load balancer to serve a high-availability site. The configuration looks something like this: [ATTACH=CONFIG]20023[/ATTACH] Essentially, two physically separate ArcGIS Server sites are mirrored and attached with a NLB on the front end. Each site serves the same secured services and are configured to use the same shared key for token generation. In this scenario, ideally when the client logs in (authenticating against the built-in store) a token will be generated which will be recognized by both server sites. Is this possible? If so, what needs to be done for this to happen? I know we can adjust the affinity settings on the NLB to prevent requests from the same client from being distributed across the two sites, but the goal is complete failover. Thanks. Happy New Year, Team, We need your assistance on the following scenario: We are taking action to migrate an existing �??Failover�?? system of ArcGIS Server 10.0 (SP5), which was constructed with two machine nodes (one is Active, another Passive) and managed by Windows Server 2008, into �??Failover�?? ArcGIS Server 10.1 (SP1). As first step, all installation and configuration at the �??Passive�?? node look fine. All services can be accessed via this host IP address. However, when we try to manage this �??ArcGIS Server 10.1�?? as EMP Cluster resource via �??EMP Cluster Group�?? manager in order to be accessible through the �??virtual�?? IP address at the Cluster, it failed. The error message show below: [INDENT]Service: ArcGIS Server (ArcGIS Server) Resource: Generic Service Parameters: Files\ArcGIS\Server\framework\etc\service\bin\ArcGISServer.exe Started 1/2/2013 8:13:57 AM Completed 1/2/2013 8:13:58 AM Creating the Generic Service resource. Do not use network name as computer name. An error occurred while creating the resource Generic Service. An error occurred while configuring the Generic Service resource. Unable to save property changes for 'ArcGIS Server'. The specified service does not exist as an installed service [/INDENT] It seems that ArcGIS Server 10.1 wouldn�??t support �??Failover�?? infrastructure anymore. If so, we have to restore ArcGIS Server 10.0 back. Isn�??t it correct? Any advices to proceed with 10.1?

‎12-19-2012

Hi ! Never heard of such limitations. You should be fine to work! In fact, we didn't see this issue in other popular 3D applications before. We do realize that CE is an memory-intensive 3D application. It is why we intend to increase massive memory for CE. However, the second common stability issue in CityEngine is when the system appears completely "frozen" or "hung" while processing an operation like rendering, editing and querying. We generally wait a while and then reboot the system (or the system automatically close the CE). This results in nothing being updated on the screen, thus appearing to the user that the system is frozen. I am wondering if there is any effective small program/tool interface available for users to easily configure the registry (GPUs and timeout detection, etc.) suitable for CityEngine running smoothly. Personally, it is good idea for CE team to develop it urgently, if not yet. Without it, it is really annoying and frustrating, while working with CE in operation. Regards,

‎12-18-2012

ArcGIS Online and ArcGIS Server team, It looks that ArcGIS Online is evolving fast with many new ideas/changes. Hope that some of our feedbacks can be considered, when you intend to change any. Recently, we have more and more �??operational�?? difficulties (i.e., 'forbidden' owing to security violations) to connect and use ArcGIS Online services at (http://services.arcgisonline.com/ArcGIS/rest/services ), including ArcGlobe, ArcGIS Explorer, and CityEngine (in addition to desktop ArcGIS). After intensive investigations, the reasons may include at least two aspects, ESRI changed the access policy to those ArcGIS Online services (�??Sign In�?? required), and our own organizations�?? tight security policies (disabled any unsecure access like �??http with login�?? practice over Internet). So, on changes of access policy to ArcGIS Online, the following ideas are raised for teams to improve so that wider customers can use those resources without any potential security concerns: [INDENT]1. ESRI provides an option (i.e., keep �??HTTP�??, but can choose �??Sign In�?? or �??Not Sign In�??) to ArcGIS Online services; 2. ESRI enables �??HTTPS�?? with �??Sign In�?? to access ArcGIS Online services [/INDENT] By the way, when will ESRI release the product of �??ArcGIS Online on Promise�?? as an �??installation�?? package for organizations? Regards,

‎12-18-2012

ArcGIS Online and ArcGIS Server teams, It looks that ArcGIS Online is evolving fast with many new ideas/changes. Hope that some of our feedbacks can be used, when you intend to change any. Recently, we have more and more �??operational�?? difficulties to connect and use ArcGIS Online services at (http://services.arcgisonline.com/ArcGIS/rest/services ), including ArcGlobe and ArcGIS Explorer, in addition to desktop ArcGIS 10.0 & 10.1. After intensive investigations, the reasons may include at least two aspects, ESRI changed the access policy to those ArcGIS Online services (�??Sign In�?? required), and our own organizations�?? tight security policies disabled any unsecure access like �??http with login�?? practice over Internet. So, on access policies to ArcGIS Online, the following ideas are raised for teams to improve so that wider customers can use those resources without any potential security concerns: [INDENT]1. ESRI provides an option (i.e., keep �??HTTP�??, but can choose �??Sign In�?? or �??Not Sign In�??) to ArcGIS Online services; 2. ESRI enables �??HTTPS�?? with �??Sign In�?? to access ArcGIS Online services [/INDENT] By the way, when will ESRI release the product of �??ArcGIS Online on Promise�?? as an �??installation�?? package for organizations? Regards,

‎11-29-2012

Just re-post here and be eager to seek brainstorming ideas and solution for this scenario. +++++++++++++ Issues on ArcGIS Server account vs. â??register shared foldersâ?? Background:[INDENT] The machine hostname called â??PC325â?? with Windows Server 2008 is used to host ArcGIS Server 10.1 SP1; The domain assumed is 'USGS.org'; The 'generic' domain account (saying, â??USGS\arcgis1â?? or â??arcgis1 (arcgis1@USGS.orgâ??) is intended for â??ArcGISServer Accountâ??, during installation and granting permissions to rigister against â??shared foldersâ??. The following strange things are described here forreference. When the domain account (saying, â??USGS\arcgis1â??)with CORRECT password is used to install ArcGIS Server 10.1, it displays to us with error message (â??invalidâ?? password). In other world, only when the format â??arcgis1@USGS.orgâ??is used, it gives â??successfulâ?? installation. With this â??successfulâ?? installation, it creates â??ArcGISServer Account (PC325\ arcgis1@USGS.org)â??. Certainly, it grants the â??read, writeâ?? permissions onto the default installation folder(saying, â??C:\Program Files\ArcGIS\Serverâ??). (Note, all data and GIS documents under this folder can be registered locally against ArcGIS Sever and published without any problems.) With this â??ArcGIS ServerAccount (PC325\ arcgis1@USGS.org)â??, it looks that it does NOT belong to the 'generic' domain account anymore, so that it fails to register any â??shared foldersâ?? , even though â??read/writeâ?? permissions are already granted to the domain account â??arcgis1 (arcgis1@USGS.org)â??. In other word, it (â??ArcGIS Server Account (PC325\ arcgis1@USGS.org)â?? looks not equal to â??arcgis1 (arcgis1@USGS.orgâ??). So, the first question is: why the installation of 10.1 couldnâ??t keep the domain account like â??arcgis1 (arcgis1@USGS.org) â??or â??USGS\arcgis1â?? during installation and then grants permissions properly? In IT Windows security, is it possible that this issue might be caused by any â??unique or specialâ?? security policies onto the 'generic' domain accounts or application servers applied by organizations? Is it reproduced in other organizations? Or, any solution to fix this issue to register ArcGIS Server against â??shared foldersâ??? +++++++++++++++ PS., Personally, with 10.1, 'register data folder' strategy as one of strict constraints for publishing GIS services is not good idea, which creates many potential security and operational issues. In fact, more and more organizations apply tight security onto the application servers (Windows, LINUX) and 'generic' domain accounts. From our intensive hands-on practice (as one of larger organizations), with 10.0 or earlier, we do not have any big problems with 'shared remote folders' to publish GIS services (image services). [/INDENT]

‎11-29-2012

Eager to seek brainstorming ideas for this scenario. +++++++++++++ Issues on ArcGIS Server account vs. â??register shared foldersâ?? Background: The machine hostname called â??PC325â?? with Windows Server 2008 is used to host ArcGIS Server 10.1 SP1; The domain assumed is 'USGS.org'; The 'generic' domain account (saying, â??USGS\arcgis1â?? or â??arcgis1 (arcgis1@USGS.orgâ??) is intended for â??ArcGISServer Accountâ??, during installation and granting permissions to rigister against â??shared foldersâ??. The following strange things are described here forreference. When the domain account (saying, â??USGS\arcgis1â??)with CORRECT password is used to install ArcGIS Server 10.1, it displays to us with error message (â??invalidâ?? password). In other world, only when the format â??arcgis1@USGS.orgâ??is used, it gives â??successfulâ?? installation. With this â??successfulâ?? installation, it creates â??ArcGISServer Account (PC325\ arcgis1@USGS.org)â??. Certainly, it grants the â??read, writeâ?? permissions onto the default installation folder(saying, â??C:\Program Files\ArcGIS\Serverâ??). (Note, all data and GIS documents under this folder can be registered locally against ArcGIS Sever and published without any problems.) With this â??ArcGIS ServerAccount (PC325\ arcgis1@USGS.org)â??, it looks that it does NOT belong to the 'generic' domain account anymore, so that it fails to register any â??shared foldersâ?? , even though â??read/writeâ?? permissions are already granted to the domain account â??arcgis1 (arcgis1@USGS.org)â??. In other word, it (â??ArcGIS Server Account (PC325\ arcgis1@USGS.org)â?? looks not equal to â??arcgis1 (arcgis1@USGS.orgâ??). So, the first question is: why the installation of 10.1 couldnâ??t keep the domain account like â??arcgis1 (arcgis1@USGS.org) â??or â??USGS\arcgis1â?? during installation and then grants permissions properly? In IT Windows security, is it possible that this issue might be caused by any â??unique or specialâ?? security policies onto the 'generic' domain accounts or application servers applied by organizations? Is it reproduced in other organizations? Or, any solution to fix this issue to register ArcGIS Server against â??shared foldersâ??? +++++++++++++++ PS., Personally, with 10.1, 'register data folder' strategy as one of strict constraints for publishing GIS services is not good idea, which creates many potential security and operational issues. In fact, more and more organizations apply tight security onto the application servers (Windows, LINUX) and 'generic' domain accounts. From our intensive hands-on practice (as one of larger organizations), with 10.0 or earlier, we do not have any big problems with 'shared remote folders' to publish GIS services (image services).

‎11-27-2012

Just for sharing: ..... ..... The BLEND mosaic operator is also combined to use, when merging overlapping imagery tiles; On hands-on comparision, the algorithm �??BLEND�?? still needs to be improved, against �??feathering�?? function in ERDAS Imagine. In other word, the BLEND mosaic operator in mosaic dataset model looks not VERY functional, when zoom-in to the larger scales. For update, With Peter Becker (Esri) assistance this issue is solved via ONLY 'Seamlines' for mosaic methods at larger scales (full-resolution). Regards,

‎11-26-2012

Just for update; This issue is already addressed in SP 1, which can display all �??roles�?? to �??admin�?? under the Tab �??Role�??

‎11-24-2012

Hi, team, In case of any emergency, it is necessary to back up the ???Identity Store???(users, roles, even permissions) and then restore back, when needed. Is there any procedure available in the Documentation Help to ???export??? and ???import???? Regards,

‎11-24-2012

Hi, team, For security settings, we are using the Option 3 (i.e., Users from an existing enterprise system like LDAP or Windows Domain and roles from ArcGIS Server???s built-in store). It looks that all work fine, except for that the system does not open and display the existing ???roles??? (admin must search and then the system displays), which is not convenient. Is this way considered to be more secure? So, without 'search', is there any effective way to open the name list of existing ???Roles??? within the ???Roles in the Identity Store??? tab under ???Security???? Regards, +++++++++++ Note, It looks that if choosing the Option 1 (i.e., all are from ArcGIS Server built-in ID store), the system will open the name list of existing ???roles??? to Admin, without 'search'.

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My Ideas

Latest Contributions by larryzhang

Re: Improve Out-of-the-box interoperability with GoCAD, Leapfrog, Vulcan, I-site , Blastlogic, Gemcom / Surpac, Geosoft, Rockware

Re: Raster Mosaic Datasets in or out of SDE? Basic Questions...

Re: Raster Mosaic Datasets in or out of SDE? Basic Questions...

The algorithm (Gram-Schmidt) produces much better high-resolution clarity

Is ArcGIS Server 10.1 working well in 'Failover' infrastructure?

configure ArcGIS Server 10.1 with 'Failover' Manager (Windows Server 2008)

GPUs and timeout detection in Win 7

Improve the access policy to ArcGIS Online services

Improve access policy to ArcGIS Online services

ArcGIS Server account (domain account) vs. ???register shared folders???

ArcGIS Server account (domain account) vs. ???register shared folders???

Re: From imagery processing perspective, the mosaic dataset model (10.1) works eventu

Re: Any effective way to display the list of existing �??Roles�?? in the ID Store (10.1)?

How to export and import the ???Identity Store????

Any effective way to display the list of existing ???Roles??? in the ID Store (10.1)?

Re: GIS to SAP Integration

Re: Open/ Use Lpkx ( new layer package )

Re: How to calculate shortest path?

Re: Cokriging with a categorical covariable?

Re: Cokriging with a categorical covariable?

Python Snippets

R-ArcGIS

Web AppBuilder Custom Widgets

ArcAPI

GIS for Geology