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Questions tagged [validation]

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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28 views

Fixing invalid geometry of bathymetry level 0 of the world in EPSG:3120 projection?

I tried in different ways to validate the bathymetry of the world in EPSG:3120 from natural earth data in QGIS 2.18.13. Open the layer in QGIS and used Check Validity in EPSG:4326 and it was valid ...
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50 views

pass selected value from drop down list in updateParameters(self) as input to python script

I managed to create two drop down lists using the validation code where an user can select the first parameter from a list and get another filtered list for the second parameter. However, I am ...
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0answers
34 views

Validate Features in ArcGIS Pro?

In ArcMap, I can easily enforce my geodatabase relationships rules (ex. one-to-one relationships) by selecting features and selecting, in the editor toolbar, the Validate Features button. I can then ...
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1answer
83 views

Google Earth KML broken

My Google Earth "My Places" will no longer populate when I open Google Earth. I still have access to the KML file. Is there a way to repair or trouble shoot the KML file to salvage the data? The ...
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0answers
229 views

How to find a polygon error in QGIS?

I loaded the following multipart polygon in QGIS which consists of three separate polygons. The highlighted (yellow) polygon consists of the bigger upper part and the smaller lower part. My aim is to ...
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1answer
32 views

Validating shape type of input feature layers in Python Toolbox of ArcPy?

How can I get in explorer folder window a layer in specify shape? For example allow: How can We look, explorer after click INPUT FEATURES, shows a layers only points type. How can I get validate ...
2
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1answer
202 views

Checking geometry validity

I'm using QGIS 3.0 and I have a problem with checking validity of the geometries of a shapefile. I imported a DXF, converted the polylines into polygons, manually corrected the wrong or intersecting ...
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37 views

Rendering 1 Million+ Feature Datasets in the Browser

I am trying to validate the best approach (raster vs. vector) for an incredibly huge and interactive dataset that needs to be plotted in the browser. I have a grid of one million+ 1km x 1km polygon ...
2
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1answer
180 views

ST_MakeValid() leaving data unaltered?

I recently received a PostGIS instance and am trying to figure out how much of my current processing workflow (in proprietary tools) can be ported over to PostGIS. One of the most frequent tasks I ...
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2answers
425 views

TIFF and TFW file validation

This is a bit of a cry for help as I’m still quite new to this. I am looking to create a thing that can validate some specific parameters for TIFF and TFW files, preferable using python, FME or ...
8
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1answer
288 views

PostGIS Multipolygon when converted to shapefile doesn't match the source geometry

I am trying to convert a MULTIPOLYGON record from PostGIS (v2.2.2) to the shapefile via QGIS (v2.18.9), but the source geometry and the resulting shapefile do not match as displayed on the images ...
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1answer
47 views

Validation of relationship cardinality not working as expected

I am using ArcGIS 10.2.1 with ArcFM extensions, and the ArcGIS validation tool. I have a feature class (poles) with several subtypes based on construction materials. It is related to a table via a ...
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1answer
611 views

Validating geometries in PostGIS

I am trying to validate the geometry of all polygons in my table. When I perform the following query, I get an error: update parcel2016 set geom = St_MakeValid(geom) ERROR: Column has M dimension ...
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0answers
286 views

How to validate high precision GPS systems location [closed]

I am currently working with a high precision RTK-GPS system which claims to be able to reach centimetre level accuracy, I am looking for a way to validate that it is actually reaching that precision ...
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1answer
133 views

Classification validation: Trouble with the Confusion Matrix

I'm supposed to validate my supervised classification with a Confusion Matrix, but I'm having a hard time getting what I should use as a comparison. At first, I used the same ROIs I created for ...
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1answer
98 views

Vector maps comparison (looking for a Kappa-like index for vectors) in R?

I am currently trying to compare two shapefiles (representing buildings) in order to validate simulation results. One shapefile contains real data and the other is the product of an urban simulation ...
2
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0answers
122 views

Topology Checking issue in Qgis 2.14.1

I am working on a large data set of Road with snapping tolerance 5px with topological editing option enable. When i am zooming to the snapped vertex with zoom level upto 1:50, its looking snapped or ...
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1answer
49 views

HALE: GML validation errors

I try to export a GML file from HALE editor but the validation has always errors with this text: The value '' of attribute 'gml:id' on element 'ps:ProtectedSite' is not valid with respect to its ...
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18 views

Looking for a company that does address validation based around GIS geocoding [duplicate]

Currently I am looking into finding a company that does address validation. My last post got flagged for not enough info. So here I go again... We currently have our GIS parcel data (address parcel ...
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2answers
3k views

fixing polygons with “ring not closed” errors

I have a shapefile with a single Polygon feature. This feature has a "ring not closed" geometry error (seen here in QGIS): I tried using buffering and the GRASS v.clean command as suggested in other ...
2
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1answer
760 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 ...
1
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1answer
501 views

Adding custom constraint to a GeoDjango table?

I wish to add a custom constraint to a GeoDjango table. This is the corresponding sql-statement: ALTER TABLE my_table ADD CONSTRAINT enforce_valid_geom CHECK (ST_IsValid(geom)); Do I really have ...
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4answers
46k 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 ...
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2answers
315 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
157 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
759 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 ...
4
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1answer
592 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 ...
5
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1answer
4k 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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0answers
423 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, ...
1
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1answer
523 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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0answers
451 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. I'...
4
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1answer
723 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 ...
2
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1answer
479 views

Validating whether shapefile exists using ArcPy?

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(): ...
2
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2answers
523 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 ...
11
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3answers
553 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
876 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 ...
1
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0answers
2k 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
779 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
338 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
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1answer
2k 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
562 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
1k 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
997 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
260 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 ...