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Transformers

Using transformers to modify data.

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10000 Posts

asked in Transformers

FME Transformer most in need of some TLC?

About once or twice a year I have to dig out the SystemCaller, mostly just because I have to trigger a PowerShell command or script file. Without fail, I end up frustrated by the byzantine syntax (quotes galore) and limited way to capture output, finally succumbing to unnecessarily re-implementing the whole thing in Python.So my pick for the transformer that really needs some love and attention from the developers is the good-old SystemCaller :-)Do you also have a pet peeve Transformer that you think could be improved upon?

28329

26 minutes ago

willydeveraContributor

asked in Transformers

Transformer that reads PAGX layout file

Hi, Just wondering: Is there a transformer that reads Esri *.pagx layout file? Greatly appreciate your help. Thanks, Willy

1 hour ago

wrijsContributor

asked in Transformers

replace points with a symbol (line geometries)

I have a point dataset representing the locations of streetlights. I want to replace each point with a small line drawing that symbolizes a streetlight. This symbol is stored as a set of line geometries and can stay line geometry.I suspect I may not be using the correct approach, but here’s what I’ve tried so far:I used a GeometryExtractor to extract the line geometry of the symbol, and a GeometryReplacer to apply that geometry to each point. This almost works — however, instead of placing the symbol at the location of each point, the points are being moved to the location of the symbol. As a result, I end up with over 4000 symbols stacked on top of each other at the original symbol location.I’ve included an image of my workspace to illustrate the issue.

694

1 hour ago

iii4625Contributor

asked in Transformers

IFC_API Reader in FME 2025.1.1 fails to read features, reads Types only

Hello,I am currently learning how FME handles IFC HVAC structures and have been using some sample files from the RWTH-E3D DigitalHub repository (https://github.com/RWTH-E3D/DigitalHub) for my tests.While doing this, I'm having trouble getting FME to read all the features and their geometry correctly. The IFC file itself appears to be valid, as it displays correctly in an external IFC viewer like BimVision. (filename: DigitalHub_FM-HZG_v2.ifc)Here you can see the full HVAC system with pipes, tanks, pumps, etc.However, when I bring it into FME, I get incomplete results, and the behavior is different depending on the version I use.1. With FME(R) 2025.1.1.0 (Build 25615):The reader fails to read most features. The feature count for IfcPipeSegment, IfcTank, IfcPump, etc., is 0. The FME Inspector confirms that nothing is read.2. With FME(R) 2025.0.3.0 (Build 25241):This older version is partially successful:It correctly reads features like IfcPipeSegment and IfcTank with their geometry.Howev

120

2 days ago

deanhowellInfluencer

asked in Transformers

Oriented Bounding

I have a building footprint layer that I am using an oriented bounding box transformer (blue line) and trying to keep the result as close as possible to the original polygon (black line) but for some reason the bounding box is getting squeezed out of shape. Does anyone have any suggestions as to why the bounding box is not aligning better?I am using it to try and automate the georeferencing of a CAD drawing and using the AffineWarper with lines that come from the corners of the bounding box. I am using the long side angle in the bounding box to rotate the CAD drawing, which in this example is still correct but the length of the long side is incorrect which puts out the affine points and scale calculation. This is a case where the footprint is a basic rectangle but there are many cases where the footprint is an irregular shape.

363

3 days ago

francisco_1988Contributor

asked in Transformers

dynamically define the data type

I have an Excel spreadsheet that serves as a data dictionary. After reading a shapefile in FME Workbench, is it possible to use this spreadsheet to dynamically define the data type of each field in the shapefile?

441

3 days ago

fmejohn93Contributor

asked in Transformers

GoogleBigQueryConnector Failed to get authorization header

I’m trying to query data from BigQuery using the GoogleBigQueryConnector and get a ‘Failed to get authorization header’ error message when trying to select a project. FME has been given access to my Google account to view and manage data in BigQuery.

455

3 days ago

vxn43Supporter

asked in Transformers

How to view/extract List from ChangeDetector?

I am using FME Form 2025 and the ChangeDetector to identify differences in records from two tables with the same schema. I have ChangedOutput create List(s) named “Changes”. What Transformer do I need to connect to the Inserted and Deleted Ports to get a look at the Lists?

192

3 days ago

zacharylee1204

asked in Transformers

New to Geometry Validator Transformer

Hello there, I really have a hard time to understand how to use the "Geometry Validator". I checked the "help" and still not sure how it works. I checked an example in IMDF validator and not sure what is the column of "Issue to detect" does, such as "contains -0, NaN, or infinity". I really hope someone can give me a light introduction on this transformer. Thank you and I am really appreciate your help.

282

3 days ago

bharat

asked in Transformers

Migrating Dimensions from AutocAD to ESRI

Hi All,I am trying to migrate Dimensions from AutoCAD to ESRI. But while doing so, i get an error "An error occurred while attempting to set the 'DimensionShape' property on the 'IDimensionFeature' interface for the dimension feature class 'PD_ServiceDim100'. The error number from ArcObjects is: '-2147220936'. The error message from ArcObjects is: {The coordinates or measures are out of bounds.}". I have assigned the coordinate system in dwg. I have tried by normally migrating the Dimension as well as re-projecting the same, but am getting the same error. To test, whether the coordinates are correct or not i placed a point feature in the same and was successfully able to migrate (without reprojecting) it to a point feature class in GDB. Not sure, whether any attribute is creating a problem for Dimensions. Any ideas ?

1294

3 days ago

fabricelamare

asked in Transformers

Published parameters value in python caller in custom transformer

Hi! I'm new to FME and I have an issue with published parameters in a CustomTransformer.I created a CustomTransformer name "TeamsConnector" which need to use the published parameters "Message" in a pythoncaller: Now in my main flow I use twice my custom transformer with different published parameters value. "Message 1" as a value for the first use of my transformer: "Message 2" as a value for the second use of my transformer: My issue is when I run the flow instead of having "Message 1" and "Message 2" as expected, I have twice "Message 1":

1339

4 days ago

thijsknapenContributor

asked in Transformers

Fetching a parameter of a Custom Transformer in a PythonCaller (of that CT), results in error

Hi, It seems to me that there might be an issue when I'm trying to fetch a parameter value of a Custom Transformer, from a PythonCaller inside that Custom Transformer. If I do so, I obtain an error. When I try to do so in the main workspace, or when I add the name of the CT in the parameterfetcher, I don't get an error, and it works. See below screenshot and the attached demo workspace for an example.This seems like a bug to me, but it would be nice if the community can have a look alongside me. Kind regards, Thijs Ps. as a sidenote, I came across this Community Question in which the best practice for accessing parameter values inside a PythonCaller is discussed. In it, it is mentioned that best practice is to use param = fme.macroValues[‘parameterName’] in favour of param = FME_MacroValues[‘parameterName’] Additionally, it is mentioned that DaveatSafe created a problem report 4 years ago to make sure that this best practice is also honoured in the script editor for the Python

739

4 days ago

johntContributor

asked in Transformers

Dynamically setting "Columns" on UPSERT in FeatureWriter to PostgreSQL

Hi, I have a dynamic workspace where I am reading in multiple csv update files for multiple feature types to upsert into our database. I had set the primary key dynamically dependent on the target table in the database. I cannot set a where clause on an UPSERT (which I do use with other feature types that have the ability to do I, U, or D) so went to use the "Row Selection: Columns:" section instead. This parameter does not work in the normal way with attributes. It presumes the selected attribute is the primary key field (no orange left arrow in front of the name), rather than using the value. I tried manually adding @Value(primary_key) (the attribute that stores the primary key column name) in the parameter but the feature writer also presumes it is literal and obviously can't find a column called "@Value(primary_key)" and errors. This is something that I would like to do, and is very much a part of a dynamic workflow. Otherwise I will have to create one dynam

3765

4 days ago

jaeContributor

asked in Transformers

iOS18 and HEIC files - are they supported in any version of FME?

It seems that in the iOS18 update Apple made changes to the HEIC file container that means the FME Feature Reader using HEIF (High Efficiency Image File Format) now fails to read the HEIC files.We are currently using FME 2022.2.Is there a later update that will support iOS18 images? Is there an alternative way to read in these images successfully?

2186

4 days ago

evoteckEnthusiast

asked in Transformers

Data Type

How can I maintain the exact postgre data type of numeric , when write it back to database. The image below is the database datatype (numeric) used used as a Reader but the above image is the writer output data type as numeric (1000,500)

210

5 days ago

francisco_1988Contributor

asked in Transformers

Managing Reading Order Conflicts

After adding FeatureReader_2, the reading order started prioritizing the XML block. Then, a join occurs with the Data Dictionary block, but since the XML is fully read first, when the flow reaches the FeatureJoiner, the data dictionary has not yet been processed, causing an error.This started after I added FeatureReader_2, because I need it to read shapefile files to extract the name and coordinate system, which are parameters defined in my spreadsheet with the paths to each shapefile.Is there any way to make the XML and Data Dictionary blocks read simultaneously? Or, since the FeatureReader is a reader, will it always have priority?

445

5 days ago

pandaEnthusiast

asked in Transformers

How to get Raster palette index value out from WMS

I’m working with getting raster imagery in the area of interest out from the WMS. It’s the Land Coverage WMS. (https://dmsdata.cr.usgs.gov/geoserver/mrlc_Land-Cover-Native_conus_year_data/wms?)End goal is to clip the Raster out from WMS into smaller area, and I need to be able to write attribute table showing the value number & RGB value in the Raster.End Product. (Smaller Raster with attribute table)The issue I’m having is that the Palette index seeing inside ArcPro and FME is different. (Approximate location, SE corner of Possom Kingdom Lake, Graford, Texas, USA.) (32.856463, -98.431004)Screenshot from ArcPro. When clicking Blue (Water) the value is 11. Screenshot from FME. When viewing the Palette after using RasterPaletteExtractor it showed Blue as 0. and I cannot figure out how to get the value “11” out of it. Also If anyone can help me figure out how to write the raster file out with attribute table that would be greatly appreciated. I’m quite new with Raster, so I’m no

341

5 days ago

alexbizInfluencer

posted in Transformers

Introducing BetterReportGenerator (BRG) – a fresh, modular take on HTML reporting

Hi everyone!Today I’d like to share a new approach to building reports in FME, along with an entire family of custom transformers I’ve created to support it. Why I built BRGI’m a long-time fan of the HTMLReportGenerator. It lets me craft reports quickly, and I love the versatility of HTML compared with, say, PDF. I even demo it in every Intro to FME course as a great example of “let FME handle the code.”But as much as I love it, I’ve always hit three pain points:1. Plain styling – it could really use a dash of CSS/Bootstrap.2. Hard-coded content types – adding a new chart or HTML element isn’t trivial.3. Cumbersome feature ordering – managing Sorters and AttributeCreators just to control layout can get messy.Earlier this year I had to build a highly procedural report with lots of HTMLLayouters, AttributeCreators, and Sorters, and the workspace quickly turned into spaghetti. That’s when I thought: I already improved SystemCaller with BetterSystemCaller… why not do the same for report ge

38715

5 days ago

geodancesContributor

asked in Transformers

Schema Mapping and DWG to SHP conversion

Hello,A DWG is converted to SHP with a Schema Mapper and Schema Scanner (This is a POC for a more complex workspace.). Output FileWhat is the Q_schemam attribute that is automatically created ? (I removed it from the writer but I am curious about it). How do I remove the original attribute from my Schema Mapper ? I selected ‘Source Attribute: Remove’ in the schema mapper, but the original attribute is still outputted. My output also contains Source Bra and Source Fea, how do I avoid writing this attributes? What are they ? Thank you

221

6 days ago

antoine.princeContributor

asked in Transformers

Problem with Esri ArcGIS Server Feature Service Reader

The FeatureReader for Esri ArcGIS Server Feature Service seems broken in 2024.0. I try to read the following feature type : "Zones de gestion intégrée eau par bassin versant - ZGIEBV";and I get the following error message : ArcGIS Feature Service Reader: Could not find a layer/table matching feature type 'Zones'Python Exception <FeatureTypeNotFoundException>: FMEException: 928219: ArcGIS Feature Service Reader: Could not find a layer/table matching feature type 'Zones' It seems to me like the feature type cannot contain spaces. This worked fine in FME 2023.

1515

6 days ago

mattdoa2

asked in Transformers

ESRI ArcGIS Server Feature Service Reader Fails When Spaces are in the Feature Type Name

I'm using a FeatureReader to read an ArcGIS Server Map Service. The map service has a lot of layers (AKA: Feature Types) which I can choose from to read.If I choose a feature type name which doesn't have a space then it works but if I choose one with a space then FME Desktop errors saying it can't find the feature type with the truncated feature type name at the first space. Here is an extract from the logs below for "Fish habitat areas" as an example of it incorrectly reading "fish" as the feature type name ArcGIS Feature Service Reader: Could not find a layer/table matching feature type 'Fish'A fatal error has occurred. Check the logfile above for detailsStoring feature(s) to FME feature store file `C:\\tempDir\\wb-cache-DownloadFishHabitats-C19216\\Main_map_service_-_FeatureReader -1 3 fo 633 _lt_REJECTED_gt_ 0 85bd7267ad00c49a5eda9b6f99fe095bbe050483.ffsupdating' Is there a way I can get around this? (I can't remove the spaces in the

764

6 days ago

aaronContributor

asked in Transformers

HTTPCaller truncating edit request with ESRI's REST API

I’m using an HTTPCaller to applyEdits using ESRI’s REST API. It includes sending along some JSON to add to a table in a feature service. The workspace runs successfully testing with 1 or 2 records in the JSON parameter, which is all sent with a single HTTP call, but fails when testing with 10 records. It looks like FME is truncating the HTTP string, which causes the request to fail. That’s what it looks like in the FME log anyway; the query string appears on two lines (see attached screenshot). If I try applyEdits in a web browser at the REST endpoint and paste the JSON in manually, I can add the data without issue. Is there a parameter or formatting change I need to make to keep FME from truncating the HTTP call? (FME Desktop/Form 2023.2.2.0, build 23764)

759

6 days ago

syedh2993Contributor

asked in Transformers

Join records with Line geometry

Hi All,I am working on data with Line Geometry and would require some help to solve the below scenario,While plotting them on map, I see there is small gap between lines in some scenarios and would like to join them together if the distance between two lines is less.(Reason for this gap - There is an asset in between the lines which has Point geometry.- Not sure if this statement will help, JFYI)Below is an example of different line geometries joining with each other, and there are small gap in some scenariosI would like to join gap between Line 3 and Line 4.gap between Line 5 and Line 6I am not interested in joining parallel line, as they are far from each otherAny help regarding the above would be much appreciated. Thanks

523

6 days ago

virtualcitymattCelebrity

asked in Transformers

Why is my logger not logging

I’m seeing some weird behaviour on FME Flow (2024.2.2)I’m trying to debug a process on FME Flow which isn’t working properly. I wanted to see what was going on so I threw down a logger, republished, reran.To my surprise the feature never made it to the logger...now I know what you’re thinking. “oh you must be doing something wrong”. Well maybe.But the workspace is so simple. Creator>AttributeManager>Logger>File Copy Writer Here’s a snippet of the log:2025-08-22 12:19:45| 0.0| 0.0|INFORM|Creating writer for format: 2025-08-22 12:19:45| 0.0| 0.0|INFORM|Creating reader for format: 2025-08-22 12:19:45| 0.0| 0.0|INFORM|MULTI_READER(MULTI_READER): Will fail with first member reader failure2025-08-22 12:19:45| 0.0| 0.0|INFORM|Using Multi Reader with keyword `MULTI_READER' to read multiple datasets2025-08-22 12:19:45| 0.0| 0.0|INFORM|Using MultiWriter with keyword `PRIMARY_DEST' to output data (ID_ATTRIBUTE is `multi_writer_id')2025-08-22 12:19:45| 0.0| 0.0|INFORM|Wr

609

6 days ago

virtualcitymattCelebrity

asked in Transformers

FMEUniversalReader from a file like object?

I have a texture embedded in a binary file. I’m trying to extract the textures and apply them to the geometry I’m loading. I figured the easiest way to do this is to read the textures in with the FMEUniversalReader. I quickly found out that I need to pass the input file as a string (filename). Ideally I’d pass this as just a BytesIO object as the library I’m working with already loads the data as a PIL object.At this point I don’r really see a way around writing out the textures to disk and then reading them again with FME. Any other ideas?

121

6 days ago

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