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Annieb08

Transform XS2D Well Detail Line Issue

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Hello, I am going through the Well Construction tutorial using my own data and am having issues when I use the Transform XS2D Well Detail Line. When I go through the steps and add the information, the tool runs and populates the WellConstructionLine feature class but the features are not visible in the same extent as the borelines on the cross section. I'm not even seeing an extent in the Source tab within the properties. I have the WellConstructionLine in the same feature dataset so I'm not quite sure why this is happening. I have attached a screen shot of the borelines at the top of the page and the well screen details at the bottom of the page. Below are the details for the well construction line and the XS2D boreline feature classes. I am using Arc Hydro GW 3.3.0 for ArcGIS 10.0. Any help would be greatly appreciated.

WellConstructionLine:

Projection: Transverse_Mercator

False_Easting: 699998.600000

False_Northing: 0.000000

Central_Meridian: -111.916667

Scale_Factor: 0.999900

Latitude_Of_Origin: 31.000000

Linear Unit: Foot_US (0.304801)

Geographic Coordinate System: GCS_North_American_1983

Angular Unit: Degree (0.017453292519943295)

Prime Meridian: Greenwich (0.000000000000000000)

Datum: D_North_American_1983

Spheroid: GRS_1980

Semimajor Axis: 6378137.000000000000000000

Semiminor Axis: 6356752.314140356100000000

Inverse Flattening: 298.257222101000020000

Domain:

Max Y: 21556500 US Foot

Min X: -17746700

Min Y: -44067200

Max X: 47877000

XS2D_Boreline:

Projection: Transverse_Mercator

False_Easting: 699998.600000

False_Northing: 0.000000

Central_Meridian: -111.916667

Scale_Factor: 0.999900

Latitude_Of_Origin: 31.000000

Linear Unit: Foot_US (0.304801)

Geographic Coordinate System: GCS_North_American_1983

Angular Unit: Degree (0.017453292519943295)

Prime Meridian: Greenwich (0.000000000000000000)

Datum: D_North_American_1983

Spheroid: GRS_1980

Semimajor Axis: 6378137.000000000000000000

Semiminor Axis: 6356752.314140356100000000

Inverse Flattening: 298.257222101000020000

Domain:

Max Y: 21556500 US Foot

Min X: -17746700

Min Y: -44067200

Max X: 47877000

post-34284-0-09623800-1385134981_thumb.p

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Without actually seeing your data, here are some things to check:

The depth values are used in conjunction with the scaling factor associated with the SectionLine to project the data onto the XS2D cross section. This basically stretches or exaggerates the display of the depth on the XS2D cross section for easier viewing. If you created the cross section with one scaling factor on the SectionLine, then edited the scaling factor, and then created the well construction details, the data will not line up. The scale factor is found in the SectionLine's VertExag2D field.

The well detail is built from both the Well features and the Well Construction fields. The Well Construction table supplies the from depth and to depth. That depth is referenced off of the Well Z value (if it's a PointZ feature class) or the "Well Ground Elevation" parameter of the tool (can be used for any Well feature class, whether it's a Point or PointZ).

So, if your reference ground elevation for a well is 100 (either from the Z value of a PointZ, or an attribute from a field like LandElev), and your FromDepth is 0 and ToDepth is 100, you would expect a line to appear from the well (z = 100) down a length of 100 (z = 0). The FromDepth and ToDepth attribute fields in your WellConstruction table are assumed to be in the same units as from the Well's ground elevation.

If your SectionLine has a VertExag2D scaling factor of 1, you would expect the new well construction line to have a length of 100 and show up with a Y value ranging from 100 to 0. Remember, the XS2D cross section is projected flat in a new data frame in Arc Map, and so the X values you see are the distance along the SectionLine, with X=0 being the start of the SectionLine, and the Y values are really the projected depth/profile/Z values, along with the scaling factor from the original SectionLine.

If your SectionLine has a VertExag2D scaling factor of 10, you would expect the new well construction line to have a length of 1000 (100 based on FromDepth to ToDepth, multiplied by a scaling factor of 10). The top of the line would be at Y = 1000 (ground elevation of 100, multiplied by a scaling factor of 10), and the bottom would be at Y = 0 (ground elevation of 100 minus depth of 100 is zero, multiplied by a scaling factor of 10).

The scaling factor (VertExag2D on SectionLine) is used to better display your cross section. Your SectionLine might be many thousands of units of length, but your wells may only be a hundred units of length. Without the scaling factor, you would only see a horizontal line for your cross sections and ground surface, without seeing any detail below the surface. If you wish to change the vertical exaggeration (scale factor), you need to run the ScaleXS2D features tool, rather than simply editing the value in the SectionLine feature. This tool will resize all XS2D feature classes associated with a particular SectionLine. I am not sure if this is what is causing your Well Detail Line features being offset.

If the scaling factor is correct, then make sure you have the proper values for Well Ground Elevation (whether this comes from the Z value from a PointZ feature class, or an attribute field), and that you are using proper values for FromDepth and ToDepth on the Well Construction table. Those are depth values (referenced below the ground surface under a well) rather than elevation values (referenced to sea level). Also, there is no unit conversion taking place.... the values are all assumed to be in the same coordinate system. If your Well's LandElev field is in feet, for example, your FromDepth and ToDepth are also assumed to be in feet. Also, when the XS2D data frame gets created, it uses the same spatial reference (coordinate system) as the SectionLine data it was based on. It looks like you're using Feet for your SectionLine data, so your Well's ground elevation should come in as feet, and the FromDepth and ToDepth in your WellConstruction table should be in feet as well.

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