The process, using formal methods, of evaluating a system or software component to determine whether it functions as expected and achieves the intended results.

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39 views

Explanation of the Thinness ratio formula?

I am looking for sliver polygons and am using the following formula to identify which polygons have a smaller area-to-circumference ratio (aka Thinness Ratio): 4 * pi * area/(length*length) That ...
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0answers
21 views

Deriving RMS Error Interpolation Method in ArcGIS

Which is the best process for deriving RMS error for interpolation methods. I would like to compare which of the interpolation method in ArcGIS is best for my data.I need the procedure of determining ...
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0answers
18 views

Rooftop Features' Validation using GIS

I am working on rooftop PV potential assessment of resident buildings using GIS tools and techniques. I would like to seek an advise that can we validate extracted rooftop features of residential ...
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1answer
28 views

What is the best strategy to add a custom constraint to a geo-django table?

What is the best strategy to add a custom constraint to a geo-django table? This is the corresponding sql-statement: ALTER TABLE my_table ADD CONSTRAINT enforce_valid_geom CHECK ...
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3answers
2k views

Online WKT and GeoJSON viewer

I once found a great but simple webpage that has a drop down with several text-based GIS formats such as GeoJSON and WKT, and a text box to copy/paste your data. The feature is then drawn on a world ...
3
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2answers
112 views

FME - Conditionally make parameters visible

I have an FME workspace in which the user sets several parameters before running. The first parameter is a multiple choice where the user selects which layers they would like to process. Depending on ...
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2answers
79 views

FME - Filter Parameter choices to only projected coordinate systems

I have an FME workspace in which the user sets several parameters before running. One of the parameters is a Coordinate System. I would like the user to choose only Projected Coordinate Systems as ...
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1answer
213 views

When is an address in a new subdivision available for mail delivery?

I have customers that are complaining that some addresses validate on the USPS validation site (https://tools.usps.com/go/ZipLookupAction!input.action) but my geocoding vendor can't geocode the ...
3
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1answer
143 views

How to determine why feature is invalid according to Validate features?

I have a feature class with a lot of domains and a lot of different properties e.g. null values, subtypes, and so on. I am using Validate features (Editor tool) and get the selection of the invalid ...
3
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1answer
953 views

Well-known text (wkt) validator

Is there anything like http://jsonlint.com or http://geojsonlint.com for WKT? How can I validate a complex WKT string, say e.g. a Multipolygon?
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148 views

How can I edit spatial data automatically on postgis and check for topology errors on said data whitout using shapefiles?

So, I have spatial data stored in postgis (points, lines and polygons) and would like to edit and update those in an Open Source software (quantum GIS, grass, etc.) to check for topologic errors, ...
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1answer
162 views

ModelBuilder - Data dependencies within model

I have a "parent" model with two nested submodels. Submodel A creates a gdb & FC's. These FC's are output and exposed as model parameters to the input of Submodel B which exports them to CAD. ...
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189 views

Interpreting U-Blox GPS receiver data

Currently I'm writing software for a simple device for car, which will compare car's location to database locations and alert user. I'm using U-Blox 5 series GPR receiver. Reference manual is here. ...
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1answer
121 views

Cross-validation of TPS and kriging outputs from the fields package in R

I am looking for existing package or functions that will allow me to cross-validate multiple outputs of Thin plate spline (TPS) and Kriging from the fields package. Does anyone know of any available ...
1
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1answer
208 views

How to validate whether shapefile exists using ArcPy and Python function?

I am very new to Python and am trying to complete my final project with not a lot of success. My code works without functions, the problem is I need it to work with functions. In the main(): ...
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0answers
58 views

ArcGIS Metadata validation

I have been importing metadata from an xml file generated with an xslt transform. During the import process, ArcGIS attempts to validate the metadata. It gives a number of cryptic validation warnings ...
2
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2answers
269 views

Call ArcGIS Repair Geometry Function from Oracle 11.2

Could anyone please point me to the right direction on how to call an ArcGIS Function (i.e. Repair Geometry) from PL/SQL? All information I found so far concerns the other way round. This is needed ...
8
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3answers
278 views

Spatial Network Cleaning

Data used to create a network from has special considerations when cleaning, as minor spatial errors can lead to major bugs in connectivity. What techniques could be considered best practice for ...
2
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1answer
430 views

GML - Multi-geometry validation

I'm doing the test to introduce multiple geometry in a WFS service using GML. For now the simple geometry is functional, but I still have some bugs with multiple geometry. I think it may come from my ...
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0answers
692 views

Validation of Regression Kriging

I am interested in exploring the idea of generating a predictive model for a target variable in a spatial context. I would then like to correct the residuals of this model using kriging, i.e. in a ...
2
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1answer
358 views

Validating Values in Multiple Fields in an Attribute Table

I've been playing around with 'Maintaining Attribute Integrity' functions found here: http://resources.arcgis.com/en/help/...000000n000000/ I see how I can set domains and subtypes to control the ...
1
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1answer
110 views

Setting More Than One Workspace

I have a number of tables that contain known values in a field. For example, I have a soil type table with one field in it. That field contains a list of known soil types. I have another table that ...
4
votes
1answer
1k views

Populating a Value List in one Parameter, from Values Derived from a Second Parameter, Python

Using the Validator in the ArcGIS 10.1 tool GUI, can I loop through and List feature classes from a workspace type parameter (ie a file geodatabase) and then go on and list the values of a field in a ...
4
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1answer
404 views

Topology problems with QGIS/GRASS

*edited file links below I'm working on several NGO projects at the moment, all of which are reliant on being able to use a district level map with some 490+ features, and I am running into some ...
3
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1answer
650 views

Possible solution for dangling nodes?

I was just asked in a interview what a dangling nodes was. I had no idea and asked a former co-worker. I was informed that a significant amount of time was spent fixing these. I was confused how ...
2
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1answer
526 views

Geometry valid in PostGIS turns out to be not valid in Oracle

Geometry is in PostgreSQL database. It is valid. Geometry is exported as GML and then inserted into Oracle database. Then function SDO_UTIL.RECTIFY_GEOMETRY(geometry, tolerance) is called, which ...
6
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1answer
203 views

How is IValidate.GetInvalidRules supposed to work?

we are currently trying to programmatically validate features against geodatabase-defined rules. This includes attribute rules as well as connectivity and relationship rules. We have consulted the ...