FAQ

TerraLand

I Can Not Download Heightmaps From “HEIGHTMAP DOWNLOADER”

A: USGS Announced The Retirement Of The Old Viewer As Follows:
“NGP is retiring The National Map Seamless Server Viewer by the end of July 2012. Access to the Seamless Viewer will redirect to The National Map Viewer and Download Platform page for up to 90 days before permanently redirecting to The National Map Viewer.”
Source: nationalmap.gov/viewer.html

In The Meantime, We Have To Find Another Available Service To Implement That In Future TerraLand Version Or We Must Wait For The API To Be Released As Mentioned Here:
Source: viewer.nationalmap.gov/help/index.php?faqID=158

Is TerraLand Available As A Free Lite Version?

A: No, TerraLand Does Not Have A Free Lite Version And It’s Only Available As A Buying Product.

There Are No Buttons And Graphics In GUI

A: When You Download & Open The “.unitypackage” File, Unity Will Automatically Import Needed Plugin Files In Your Project Under “Resources => TerraUnity” Folder. If These Files Have Been Removed Accidentally, Just Reopen Or Double Click The Downloaded “.unitypackage” File To Reimport Removed GUI Files.

What Do I Have To Write In Top, Left, Bottom And Right Fields?

A: Top, Left, Bottom And Right Fields In “HEIGHTMAP DOWNLOADER” Are Numbers In Decimal Degrees Coordinate System Format. All Fields Must Be Filled To Define Area Of Interest For Downloading The Heightmap.

What GIS Data Formats Does TerraLand Support?

A: Currently, Usable GIS Data Formats Are:

Terrain “Heightmaps” From Any Sources With Unity’s Native Heightmap Supported Format Which Is “.raw”.
“Satellite Images” With Any Texture Formats That Unity Supports.
“Image Maps” With Any Texture Formats That Unity Supports.

What Is The Data Source In “HEIGHTMAP DOWNLOADER”?

A: The source To Download Elevation Data In TerraLand-Terrain Is NASA USGS Seamless Server.

TerraTrees

Can I Place Multiple Vegetation Models And Trees At The Same Time?

A: Yes, When You Have More Than 1 Vegetation Model Available In Terrain System, A New Option Called “COLLECTION TREES” Will Be Available For You In TerraTrees GUI. You Must Enable This Option By Expanding It And From There You Can Select Which Trees From Terrain System Must Be Placed At The Same Time With “Priority” Option. By Default “USE ALL TREES” Option Is Checked To place All Availabe Terrain Trees Simultaneously On Terrain.

Can TerraTrees Place Vegetation Models And Trees On A Non-Terrain Object Or Geometry?

A: No, TerraTrees Needs A Terrain To Place Tree Models Over It. Obviously, This Has Great Advantages In Performance & Visuals To Use Terrain Engine’s Tree Manager Settings

How Can I Switch Between TerraTrees Placement Modes Of “INTELLIGENT TREES”, “MAPPING TREES” And “NORMAL TREES”?

A: By Default When TerraTrees Loads, “INTELLIGENT TREES” Mode Is Active. Switch Between “INTELLIGENT TREES” & “MAPPING TREES” Modes By Expanding/Contracting “MODE SWITCH” From GUI. To Activate “NORMAL TREES” Mode, Go To “SETTINGS” At The Bottom Of The GUI And Check “Normal Tree Placement On Entire Terrain”.

TerraTrees Progress Shows Trees Are Placing, But When The Placement Finishes I Can’t See Any Trees On Terrain.

A-1:    Make Sure The Imported Vegetation Model Is Not Too Small In Unity’s “Importer Settings”.

A-2:    In TerraTrees “TREES VARIATION”, Check If “SCALE” Values In “Width” & “Height” Are Not Too Small. This Value Is The Initial Scale Of The Placing Vegetation Models.

A-3:    In Terrain Engine “Other Settings”, Make Sure That “Draw” Checkbox Is Enabled. In TerraTrees “VEGETATION PREVIEW”, Check If “TREES” Are Turned On Or Other Options Values Are Not Too Small.

There Are No Buttons And Graphics In GUI

A: When You Download & Open The “.unitypackage” File, Unity Will Automatically Import Needed Plugin Files In Your Project Under “Resources => TerraUnity” Folder. If These Files Have Been Removed Accidentally, Just Reopen Or Double Click The Downloaded “.unitypackage” File To Reimport Removed GUI Files.

Unity Crashes When Placing Large Number Of Trees

A: You Can Easily Turn Off Trees In “VEGETATION PREVIEW” From TerraTrees GUI And Then Place As Many As Trees You Like, Then You Can Turn The Trees On Again To See The Placement.

This Issue Is GPU Memory Related When Trying To Render Large Number Of Polygons And Specially Terrain Changes Flushing In Real Time.

When I Press “PLACE TREES”, No Trees Are Placing Or There Are A Very Small Number Of Them Placed.

A-1:    Check “PLACEMENT DENSITY” In TerraTrees GUI. The Higher This Percentage Number Is, More Trees Are Going To Place.

A-2:    Check “MAXIMUM TREES No.” If It’s Not Set To Zero Or A Low Value.

A-3:    In “INTELLIGENT TREES” Mode, Check Satellite Image To have Green Colors In It.

A-4:    In “MAPPING TREES” Mode, Make Sure To Select An Available Color By “COLOR PICKER” From Tree-Map. If Desired Placement Area In Map Contains A Color Range Of A Unique Color-Family (For Example 2 Blue Colors Which Are Slightly Different From Each Other), Try To Increase The Value Of “DAMPING” Feature.

A-5:    In “ENVIRONMENT SETTINGS”, Check If “Steepness Range” Min & Max Values Are Not Too High Or Too low And Also They Are Not So Close To Each Other.

A-6:    In “ENVIRONMENT SETTINGS”, Check If “Elevation Range” Min & Max Values Are Not Too High Or Too low And Also They Are Not So Close To Each Other.

TerraCity

Buildings Are Placed Out Of Terrain Boundaries

A:  Make Sure The Buildings-Map Resolution Is Not Higher Than Terrain Resolution. This Will End Up To have Buildings Out Of Terrain Boundaries. For The Best Placement, Try To Have Equal Or Close Resolutions For Terrain & Map.

Can TerraCity Place Building Models On A Non-Terrain Gameobject Or Geometry?

A: No At First Place, TerraCity Needs A Terrain To Place Building Models Exactly Over The Terrain Surface. However You Can Then Remove And Delete The Terrain And Replace It With A Gameobject Or 3D Model.

If The Area Is Fully Flat, Just Insert A Flat Terrain In TerraCity To Generate City On It. Again, You Can Then Remove And Delete The Terrain And Replace It With A Gameobject Or 3D Model If Needed.

Is TerraCity Geo-Referenced And Can It Load GIS Data For City Simulations?

A: No, TerraCity Is Not Geo-Referenced Yet, But This Feature Is In Our Pipeline.

TerraCity Is Active And Whenever I Add A Building Model Or Texture To Its Folders, It Gives Errors And Becomes Unresponsive

A:  Before Adding Models, Prefabs And Textures, Turn Off TerraCity Or Close It. If You Add Items While TerraCity Is Active, It Will Give Errors, You Have To Close TerraCity And The Next Time You Open It, The Problem Will Be Solved. The Reason Is That TerraCity Can Not Update Its Database When It’s Active.

There Are No Buttons And Graphics In GUI.

A:  When You Download & Open The “.unitypackage” File, Unity Will Automatically Import Needed Plugin Files In Your Project Under “Resources => TerraUnity” Folder. If These Files Have Been Removed Accidentally, Just Reopen Or Double Click The Downloaded “.unitypackage” File To Reimport Removed GUI Files.