How to get the center position of a parcel?

[brightacs]

Hi! Guys! Do youi know how to get the center position of a parcel?And how to get the edge position of a parcel?

[Abigail Longmeadow]

If you are on the ground, Control-Alt-Shift-P will turn on or off property lines. These lines will show the edge of each parcel (unless the ground is covered up). To find the position in numbers, use the Build menu to rez a box, make it small, keep the box in Edit mode, and move the box untill it is right on the property line. Then read the position of the center of the box in the edit "Object" tab. It will give you X, Y, and Z numbers. X is East, Y is North, and Z is elevation.

[Knowl Paine]

All Parcels are not square.

Regions are square.

Not sure what you want to do.

I suspect, that when a Parcel's coordinates are entered in the World Map search field, and the Land Parcel does not have a set landing point, the Map Beacon may center upon the plot. You would have to test that on irregular shaped parcels (plots).

I know that just entering the Name of a Region on the map, will place the map beacon centered in the region. 128x128

[Rolig Loon]

Knowl's right.  A parcel can be any wierd shape, so there's no clean way to get the center point by geometry.

[Frank90a]

On 1/13/2013 at 9:53 PM, Knowl Paine said:

All Parcels are not square.

Regions are square.

Not sure what you want to do.

I suspect, that when a Parcel's coordinates are entered in the World Map search field, and the Land Parcel does not have a set landing point, the Map Beacon may center upon the plot. You would have to test that on irregular shaped parcels (plots).

I know that just entering the Name of a Region on the map, will place the map beacon centered in the region. 128x128

The answer is simple. This person wants to put an object dead centre a parcel they own in order for themselves and/ or others to best enjoy an experience.

There are many reasons you might want to find dead centre of an object or area. I can think of two very good reasons. One would be shear curiosity which is the thing that separates civilized, progressive societies and peoples from warlike and barbaric peoples. Another might be to define boundaries, which in this context, would be so as not to infringe upon the enjoyment of others or in the case of uncivilized tribe, enhance their own enjoyment.

Let's say you decide you'd like a security orb. Who knows why. So you plop it down on your parcel and leave. In the mean time, others walking or driving on the road, conducting business, or just relaxing in their own home or business are now spammed, harassed,  and otherwise attacked by the virtual automatic griefing monster you intended to only watch your place. Square, in this case, doesn't really make a difference. We are looking for the centre point of a circle that does not extend past your property lines in order to virtually chain the obnoxious beast up before someone calls Second Life animal control. That would be the shortest leg from dead centre to any boundary. Either way, it looks like some math and gosh and by golly experimentation is needed in Second life before unpacking your griefer pet, and giving it a big yummy bowl of land impact.

My parcel is a perfect square. Doing a quick survey I noticed all parcels in my region are perfect 32 meter by 32 meter squares. That can be useful, but it's still not straight forward. That means if I find one X coordinate from one side, and one Y coordinate from a joining side, all I need to do is find the point 16 meters from each side toward the centre, and that's  dead centre. That's just a bit less making enemies of your neighbours. The trick is finding those coordinates.

I noticed on the parcel I live on now, the coordinates are not automatically centred. If I want a virtual griefing monster to keep me company, yet still not get hit with a virtual lawsuit, I better do some measurements. For the most accurate measurement I could get, I made two  objects 16 meters long and 0.1 meters wide. One along the X axis, and  the other along the Y axis. Along the Z axis it doesn't seem to care anyway, although a spherical boundary would have been great. It just wasn't having it. Either way, where the two object meet is the centre. I still didn't quite trust that either though, and for an odd shaped parcel you definitely can't trust that. I brought it in one meter to keep critters, sounds, and whatever else more securely inside. That also keeps a good easement for pedestrians or other scripts running nearby. I noticed also that the land boundaries do move. Not much, but it's enough to notice.

Good luck on your travels, and thank you for asking an important question that helps an entire community be just a little less on edge. 

 

Edited February 21, 2023 by Frank90a

[Rowan Amore]

1 hour ago, Frank90a said:

Let's say you decide you'd like a security orb. Who knows why. So you plop it down on your parcel and leave. In the mean time, others walking or driving on the road, conducting business, or just relaxing in their own home or business are now spammed, harassed,  and otherwise attacked by the virtual automatic griefing monster you intended to only watch your place. Square, in this case, doesn't really make a difference. We are looking for the centre point of a circle that does not extend past your property lines in order to virtually chain the obnoxious beast up before someone calls Second Life animal control. That would be the shortest leg from dead centre to any boundary. Either way, it looks like some math and gosh and by golly experimentation is needed in Second life before unpacking your griefer pet, and giving it a big yummy bowl of land impact.

Most security orbs are scripted to only encompass your property regardless of whether they're centered or not.

Also,   it's a 10 year old question.
January 13, 2013

[Frank90a]

I thought about it, and just figured out an even easier way. I made a cylinder, and scaled that along the X and Y axis. That gave me a more accurate dead centre without even doing math. Try that.

I looked for the question to figure out why security orbs were attacking and spamming me in sand boxes, on the road, on the water ways, or even in my house. I don't doubt you, but it's an important question that needed an answer. Where exactly do You, I or anyone else have permissions. 10 years old means it needs bumped up and answered.

Security orbs and other scripts might be broken, and that probably really needs to be addressed as well. That is a good point. Why are the security orbs getting out, causing lag, and harassing passers by in the first place? But that's a different post. Right now I'm describing, as best I can, how to keep your stuff that works on your property. I'm sure there is a lot more about all of this that can be discussed for posts that are just as old and forgotten. 

[Chic Aeon]

Well I honestly didn't read all the LONG answers here but if the OP owns the parcel then go to the PLACES pages and find the parcel under your name (account).  Use the places page to go to the parcel. It always goes to what it considers the center of the parcel.   You will be able to see the coordinates in the SLURL>

[Qie Niangao]

Necro notwithstanding…

Note that, however it's calculated, the center of a parcel may not be part of the parcel.

As for "security" scripts that spam messages to agents not on the parcel: those scripts are simply defective. No messages should be sent to anybody not llOverMyLand(), ever. Scripters who don't know how and when to use that function should really be scripting something less intrusive than a "security" system.

[Lucia Nightfire]

16 hours ago, Frank90a said:

10 years old means it needs bumped up and answered.

The answer is simple. Back when this question was asked, security orbs were horribly scripted and many still are today.

Many orbs today still do not check if an agent is over the parcel, only if they were detected by a sensor.

Back in Jan. 2013, llGetAgentList() had only been grid-wide for 9 months.

Most of all existing security orbs at the time had not been updated nor replaced with ones that used this function.

Many people still buy/use outdated security orbs because they go off of high review/rating counts on MP listings, the bulk of which were done in years past for products that have never been updated.