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Wednesday, February 15, 2017

List of things appropriate and not appropriate for ArcGIS from Citrix Environment

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Appropriate for Citrix
·         making maps with existing data
·         querying and selecting spatial data
·         creating GIS points from XY coordinates (GPS files)
·         Sub -setting data by selection and export
·         Creating or editing GIS data feature by feature
·         Buffering small data layers (few features, simple features)
·         Joins on attribute tables
Not Appropriate for Citrix
·         Geoprocessing (Intersect, Union, Identity …)
·         Sub -setting data by Clipping
·         Spatial joins
·         Spatial Analyst
·         Buffering large or complex data layers

Thursday, January 19, 2017

Code snippet : Create/update polygon attribute fields using Ogr and ESRI Arcobjects

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A code snippet example to check if a feature is standalone ESRI Shape or featureclass inside ESRI Gdb, then add new filed or update attribute value in attribute table .... standalone shape/features are created/updated using GDAL/OGR implementation and feature/featureclass stored in ESRI personal GDB are created/updated using ESRI ArcObjects.  Any solution to replace later with GDAL/Ogr is highly appreciated.  Please comment below if you find one.

 public void AddUpdateAttributeField(string oldFeatureFile)  
     {  
       DriverUtils.RegisterOgrDriver();  
       DataSource dataSource;  
       Layer layer;  
       var isShapeFile = IsShapeInGdb(oldFeatureFile);  
       if (isShapeFile)  
       {  
         dataSource = Ogr.Open(oldFeatureFile, 1); //second argument in open specifies mode of data, 1 RW & 0 readonly mode  
         layer = dataSource.GetLayerByIndex(0);  
         FieldDefn gdalFiedlDefn = new FieldDefn("FID_GDAL",FieldType.OFTInteger);  
         layer.CreateField(gdalFiedlDefn, 0);  
         Feature feature = layer.GetNextFeature();  
         while (feature!= null)  
         {  
           feature.SetField("FID_GDAL",feature.GetFID()); // Add FID shapefile  
           layer.SetFeature(feature);  
           feature = layer.GetNextFeature();  
         }  
         dataSource.FlushCache();  
       }  
       else  
       {  
         try  
         {  
           EnableEsriLiscences();  
           string gdbPath = Path.GetDirectoryName(oldFeatureFile);  
           string featureName = Path.GetFileNameWithoutExtension(oldFeatureFile);  
           IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactory();  
           IFeatureWorkspace featureWorkspace = (IFeatureWorkspace)workspaceFactory.OpenFromFile(gdbPath, 1);  
           IFeatureClass featureClass = featureWorkspace.OpenFeatureClass(featureName);  
           IFields fields = featureClass.Fields;  
           if (fields.FindField("FID_GDAL") == -1)  
           {  
             // Create a Int field called "FID_GDAL" for the fields collection

Friday, January 13, 2017

Code snippet: Create new Field in a Shape File using GDAL/OGR in C#

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Add new field in existing shape file using OGR in C#.
 public void AddAttributeField(string oldShapeFile)  
     {  
       Ogr.RegisterAll();  
       DataSource dataSource = Ogr.Open(oldShapeFile, 1); //second argument in open specifies mode of data, 1 RW & 0 readonly mode  
       Layer layer = dataSource.GetLayerByIndex(0);  
       FieldDefn gdalFiedlDefn = new FieldDefn("NEW_FIELD",FieldType.OFTInteger);  
       layer.CreateField(gdalFiedlDefn, 1);  
       Feature feature = layer.GetNextFeature();  
       while (feature!= null)  
       {  
         feature.SetField("NEW_FIELD",feature.GetFID()); // Populate new field with feature FID  
         layer.SetFeature(feature);  
         feature = layer.GetNextFeature();  
       }  
       dataSource.FlushCache();  
     }  

Friday, December 30, 2016

ESRI FeatureClass vs Feature Layer

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Feature Layer: A layer that references a set of feature data. Feature data represents geographic entities as points, lines, and polygons.

Feature Class:In ArcGIS, a collection of geographic features with the same geometry type (such as point, line, or polygon), the same attributes, and the same spatial reference. Feature classes can be stored in geodatabases, shapefiles, coverages, or other data formats. Feature classes allow homogeneous features to be grouped into a single unit for data storage purposes. For example, highways, primary roads, and secondary roads can be grouped into a line feature class named "roads." In a geodatabase, feature classes can also store annotation and dimensions.

Rasterized Feature Layer: A feature layer in ArcGlobe that exists as points, lines and polygons but is rendered as cell data. When layers are added to ArcGlobe, they may automatically be rendered in raster format to retain their cartographic symbology.

Monday, December 12, 2016

Register Database to ArcGIS server

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There are two methods to register Database to ArcGIS Server
A) Register via ArcGIS Desktop

  • Double click to ensure ArcGIS Server Instance is connected to ArcGIS Desktop
  • Right Click to Publisher connection to ArcGIS Server
  • Then Click ArcGIS Server Properties to open ArcGIS Server Properies
  • Add Data Store in Registered Databases




B) Register via ArcGIS Server Manager Web Interface

SOURCE: http://gisdeveloper.blogspot.com/2014_04_01_archive.html ( Copied here for my future reference)
REGISTER DATABASE TO ARCGIS SERVER

While publishing data (from database) to ArcGIS server it gives you a warning that

24011: Data source is not registered with the server and data will be copied to the server

How to resolve this ??
Well there are different approaches, here is the one which i followed. But before doing anything Please Note:
Note: The client side libraries need to be copied to ArcGIS server's bin folder. What does this mean ??
Well you have to copy the libraries (obtained from esri's customer portal Or simply google it "PostgreSQLClientLibs922" Or PostgreSQL libraries for ArcGIS server)
Copy the correct version of libraries to
C:\Program Files\ArcGIS\Server\bin   

Note to see the correct version of libraries click here.

Now,
  • Open ArcGIS server Manager from (prefer Internet Explorer)http://localhost:6080/arcgis/manager/site.html
  • Sign in to your ArcGIS server account
  • On home Page under Directories tab click on Data Store
  • Click on Registered Database

Monday, December 5, 2016

Postgresql tips

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Start to postgresql :  sudo -u postgres psql postgres
List all databases : 
  • \list or \l: list all databases
  • \dt: list all tables in the current database
Type \q and then press ENTER to quit psql
Connect to database : \connect database_name
Drop all tables from a database:  drop schema public cascade;

Tuesday, November 22, 2016

 

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