Italy Map Journal

New and Improved Italian Story Map

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Add Field to a SQL Geodatabase using T-SQL

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Sometimes a new field will need to be added quickly. The usual process of testing changes and pushing said changes to production is not very time sensitive. Here is a method I use when a new field is needed ASAP. In this case the feature classes have been registered in the geodatabase and archiving has been enabled. This means there is an SDE base table and several SDE delta tables. The information needed to proceed is listed below. This will require DBO level access and SQL Server Management Studio or other suitable RDBMS interface like Toad. Database Name = DemoData New Field Name = NewField New Field Type (Length) = string(50) / nvarchar(50) SDE Field Type Code =   Unknown New Field Name = NewField Feature Class Name = Marker Base Table Name = Marker Base Table ID = Unknown Delta Table (Adds) = Unknown Delta Table (Archive) = Unknown First thing to do is find the unknown values. The SDE Field Type Code via Esri tells us that the SDE Field Type Code for Stri...
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Enterprise Geodatabase Maintenance

I have several enterprise level geodatabases (GDB) to manage. Instead of setting up maintenance scripts for each project GDB, I decided to write one script to manage them all. (Get the movie reference?) This script requires two directories to be setup 1) OwnerFileDir and 2) AdminFileDir. The first will store several SDE owner connection files; one per database. Owner is usually "dbo" or "sde". The second will store several Esri object owner connection files; one per database. The Esri object owner is the user that owns each object's schema e.g. < DatabaseName >.< Schema >.< PolygonFeatureClassName >. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 ...
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Animation with ArcGIS Pro

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I collected data from Harris County Flood Control District and USGS for rainfall and stream heights.  I requested data between August 25th and September 5th, 2017 which was the time frame Hurricane Harvey rolled through the area. This animation shows the rainfall accumulation and stream height swell. The streams turn red once the height of the stream went above the top of bank. Here is the full video.
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