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For tutorial at ArcGIS Help (10.2, 10.2.1, and 10.2.2) and ArcGIS Help 10.1 For graph data for ESRI at http://www.arcgis.com/home/item.html?id=d6bd91b2fddc483b8ccbc66942db84cb
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11-19-2014
03:39 AM
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The most recent version of imaging radar, known as spotlight-mode SAR, can produce imagery with spatial resolution that begins to approach that of remote optical imagers. For all of these reasons, 'airborne' synthetic spotlight aperture radar imaging is rapidly becoming a key technology in the world of modern remote sensing for high-resolution generation of DEM, except for higher cost and different imagery processing workflows (than scan-mode /InSAR or LiDAR). With the wide use of SPOTLIGHT polarization technology applied to satellite, 'spaceborne' spotlight SAR sensors like COSMO-SkyMed, TerraSAR-X, and TanDEM-X enable us to handle high-resolution stereo-pair HH/ VV SAR images (up to 1-m), to 'accurately & cost-effectively' generate 3-5 m resolution of DEM for large coverage, via the following rigorous workflow. For spotlight-mode SAR imagery registration and processing, refer to the attachement. ++++++++++++++++++++++++ PS., The techniques of generating high-resolution DEM (0.15-5 m resolution) are widely discussed and used in operation, including Interferometric Synthetic Aperture Radar (InSAR) and Light Detection and Ranging (LiDAR) along with advancements in the ability to extract elevation data using conventional stereo-pair photogrammetric methods for airborne and spaceborne OPTICAL /near-IR sensors (GeoEye-1, WorldView-2/3, Pleiades-1A/1B, SPOT-6/7, etc.). Among those, modern airborne & spaceborne imaging radars, known as synthetic 'scan-mode' aperture radars (SARs), are capable of producing high-quality pictures of the earth's surface while avoiding some of the shortcomings of certain other forms of remote imaging systems. Primarily, radar overcomes the nighttime limitations of optical cameras, and the cloud- cover limitations of both optical and infrared imagers. In addition, because imaging radars use a form of coherent illumination, they can be used in certain special modes such as 'interferometry', to produce some unique derivative image products that 'incoherent' systems cannot.
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11-17-2014
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Obviously, it is helpful, no matter whomever you are, ‘dedicated SDE + DB developer’ administrator, data warehouse administrator (SDE + ArcGIS Server + developer), or geospatial analyst… In fact, in many organizations, those roles are hardly differentiated, because the managements mostly want the projects done as effectively as possible, in addition to data administration… +++++++++++ Bo, I don't see the workscope for this project. However, I believe that SDE team is moving in this direction. Traditionally, Bash or Perl are the tools of choice when operating systems need some scripting. Given their ease of use, they have become virtually ubiquitous and seeped into other software, including Oracle Database - which relies on them extensively for all kinds of administrative and management tasks. Recently, however, this trend has shifted in favor of newer programming tools like Python, which offers intuitive development and a variety of flexible data structures and libraries. All modern Unix and Linux systems come with Python on board; for example, Oracle Linux 6.1 ships with Python 2.6.6.
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11-13-2014
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Kristopher, Personally, most ESRI basemaps, including Topographic Map, are ‘fused & cached’ tiles, which are hosted at the server, even though those 'tiled' sources are from feature classes or others in SDE. To the public, only way to extract is to digitize, if features can be located from the basemaps. However, I see your points from your questions. In fact, Google Maps offer individual layer of ‘cached’ tiles like buildings, roads, rivers, etc. Some of the servers like ArcGIS Server and Google Earth Enterprise (GEE Server, GEE Fusion) offer this type of capability. For example, if databases built and configured to fit this type of pouposes, you will have a way to extract / export specific 'cached' layer under certain AOI, including GEE Fusion and Google Earth EC/ Pro (GE EC/ Pro) … Refer to An overview of the Data Extraction toolset—ArcGIS Pro | ArcGIS for Professionals
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11-12-2014
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Good & correct effort from SDE. We like very much! Thx a lot, team. With the interface to those SDE admin tools in Catalog/ ArcCatalog, it will make geospatial professionals have more time on data quality, data integrity, application development and analysis, .... Personally, it also offers more adavantages over other spatial engines like Oracle Spatial & SQL Server Spatial. Alternatives to using SDE command line tools in ArcGIS | Support Services Blog
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11-12-2014
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Greeting, Dan, Really nice! You are making many efforts to help others...
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11-12-2014
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Thx, Dan, Nice works. However, really curious on the details how ESRI implements Djkstra's Algorithm in Network Analyst for efficiency…Can you instruct? Govinda, For network data analysis with ArcGIS 10.x, it would be nice also to do hands-on with 'The data that the ArcGIS Network Analyst tutorial exercises and workflows reference' at http://www.arcgis.com/home/item.html?id=d6bd91b2fddc483b8ccbc66942db84cb ...which offer deep insight on how ESRI Network Analyst tackles graph data for routing questions. After those exercises, you can build a 'network dataset' and perform analyses on a 'network dataset' (rather than SHP file) with ESRI NA, including OD cost matrix. By the way, please also refer to the 'Engineering Fast Route Planning Algorithms' (attachment)...
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11-11-2014
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kristopher, Generally, to answer your question, it can be divided into two aspects: 1. Yes, you can extract; however, that would be a 'manually digitizing' approach, if you can locate your buildings from any ESRI or Bing basemaps. The reason is: those basemaps are not feature class or raster imagery. Inversely, most are 'cached & fused' tiles.. 2. Technically and operationally, there are some techniques to automatically extract features from raster imagery (airphotos, satellite imagery), including building footprints. The effective one is called 'object-oriented' feature extraction. Pls refer to Creating building shape-files from aerial photos
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11-10-2014
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govinda, Please refer to Path Distance & associated tools inside Distance toolset at http://resources.arcgis.com/en/help/main/10.2/index.html#/An_overview_of_the_Distance_tools/009z00000014000000/ and ArcGIS Help (10.2, 10.2.1, and 10.2.2) Keep in mind that the GP tools under Distance toolset (least cost) is only used for two points (target, origin). If planning to create matrix of cost distance from more points (more targets, more origins), Python looping scripting is required….
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11-09-2014
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One more: to setup workspaces (current workspace, scratch workspace, scratch gdb, ...) for Pro, refer to Current Workspace (Environment setting)—Geoprocessing | ArcGIS for Professionals
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11-09-2014
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Aaron, Please refer to https://pro.arcgis.com/en/pro-app/help/projects/overview/the-project-pane.htm for workspace connections, which are also different from ArcGIS desktop. good idea to create the remedy for ESRI support...
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11-09-2014
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In practice, many customers like hydrologists and water management are not satified with flooding analysis and prediction studies, especially, when those results are from GIS-based flooding modeling applications. To improve the reliability of Flooding Disaster Prediction and Mapping, GIS experts with many hydrologists usally concentrate acquisition and processing high-resolution geospatial data like cloud points for higher DEM generation. Some flooding applications improve their analysis also via simulation... However, the experiences show that those efforts would not produce more reliable analysis, because of differences in roughness, rock hardness of geological formations, flow depth, and slope, the timing of runoff from most parts of a watershed differing from that along the principal flow path (which is generally used to compute times of concentration). Those GIS-based flooding apps are just 'simplified' hydrologic models. Besides, uncertainty analysis in those flooding models mostly ignores geological (and some of very important hydrologic) factors, which are usually major impacts on the reliability of flooding analysis and mapping. Hydrological modelling - Wikipedia, the free encyclopedia and Hydrological transport model - Wikipedia, the free encyclopedia As well known, people commonly apply 3D geological modeling techology into groundwater analysis applications (attachment). In fact, when dealing with surface and surface-subsuface water applications, we also shouldn't ignore this important geological approach. For example, when applying SWMM/RUNOFF algorithm in GIS-based flooding model, different rock hardness of geological formations, faults, soil and trees for infiltration, upland erosion (like CASC2D-SED, which simulates soil erosion from overland flow and routes sediment by size fractions to the outlet of a watershed) are hardly considered, even in some famous Surface Runoff Models (rainfalls, simplified recharges)… Illustration of water cycle A similar intention (BUT, different implementation at all) to combine large quantities of outcrop data into a geodatabase can be referred at The SAFARI geodatabase: Exploring geological outcrop analogues for reservoir modeling | ArcGIS Blog Certainly, without the details on both 3D surface and subsurface geology and hydrology, it is really chanlenging to get reliable flooding analysis and prediction...
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11-08-2014
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Rachael, pls attach two 'snapshots', including the file/ format and distribution pattern from your spot elevations and controls (stream invert, curbs), for constructive advice. +++++++++++ Generally, if your spot data is well-represented in a TIN model, the effective interpolation with error assessment should be used to estimate for 'fresh' DEM generation, especially, when to add polygon derived from more controls to improve the accuracy during DEM generation. If merging TIN and polygon features derived from controls, raster GP tools like 'Plus' will be helpful, before properly interpolating for higher accurate DEM. And secondly, please refer to Kernel Interpolation With Barriers at ArcGIS Help (10.2, 10.2.1, and 10.2.2) and Spline with Barriers at .ArcGIS Help (10.2, 10.2.1, and 10.2.2) ; From controls as constrain, those two GP tools can help you further ... In fact, it is also necessary to re-tune DEM with more controls in 3D flooding modeling, in addition to 2D flooding mapping. 2D flooding analysis 3D flooding modeling
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11-08-2014
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Chris, When to bring 3d plant models into GIS like ArcGIS, facing three issues, as mentioned: 1. too details with huge size (i.e., very common to have 1 - 2 GB or more, if via Collada), which are not allowed to reduce 100-500 times from 3D Plant models, on customer requrements (i.e., keep the details as much as possible); 2. non-georeferenced (i.e., most of plant engineers /designers are still not aware of the spatial technology); 3. loss of intelligence When Collada is biger, ESRI 3D (including GP tools and CityEngine) couldn't import; After smaller Collada imported, if 3D models having no geo-referenced, ESRI 3D (ArcGlobe) couldn't geo-locate onto correct location on the earth (Edit mode); and big issue is to convert via Collad, because all attributes/ annotations associated with objects in 3D CAD model are lost in 3D GIS, which is certainly issue... In fact, it is effective and secure to use geospatial solutions as corporate 'all assets' platform (within enterprise 'Cloud'). The network, security and storage are not issues to those large organizations .
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11-03-2014
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JB, Did you reproduce this issue? As expected, using getpass in python echos password in Windows (Python 2.7 or earlier), that is, a UserWarning subclass issued. 10.1 10.2.2 Warning (from warnings module): File "C:\Python27\ArcGIS10.1\lib\getpass.py", line 92 return fallback_getpass(prompt, stream) GetPassWarning: Can not control echo on the terminal. Warning: Password input may be echoed. Enter password: Warning: Password input may be echoed Enter password: The same issu is applied to all scrips, when using getpass, for example, start a service by starting the geometry service at ArcGIS Help (10.2, 10.2.1, and 10.2.2) Didn't try 10.3 Prerelease (I guess, the issue exist because 10.3 uses still Python 2.7). I tested with 3.4, which is fine in Python 3.4 (that ArcGIS Pro uses). Keep in mind, if we directly run the code like username=getpass.getuser() OR username = raw_input("Enter user name: "), it would be fine. Pls check at https://community.esri.com/message/284618#284618 Of course, if input without using 'getpass', the example works.
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11-03-2014
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